diff --git a/src/Nacha/Field/CompanyEntryDescription.php b/src/Nacha/Field/CompanyEntryDescription.php
index e3381ce..001c1d9 100644
--- a/src/Nacha/Field/CompanyEntryDescription.php
+++ b/src/Nacha/Field/CompanyEntryDescription.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Field;
 
-class CompanyEntryDescription extends String {
+class CompanyEntryDescription extends StringHelper {
 
 	// upper case trigger words
 	private $triggers = ["reversal", "reclaim", "nonsettled", "autoenroll", "redepcheck", "no check", "return fee", "hcclaimpmt"];
diff --git a/src/Nacha/Field/CompanyName.php b/src/Nacha/Field/CompanyName.php
index 15f0368..38864b6 100644
--- a/src/Nacha/Field/CompanyName.php
+++ b/src/Nacha/Field/CompanyName.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Field;
 
-class CompanyName extends String {
+class CompanyName extends StringHelper {
 
 	public function __construct($value) {
 		$value = strtolower($value) == 'check destroyed' ? strtoupper($value) : $value;
diff --git a/src/Nacha/Field/FileIdModifier.php b/src/Nacha/Field/FileIdModifier.php
index 3f0029c..21e67f1 100644
--- a/src/Nacha/Field/FileIdModifier.php
+++ b/src/Nacha/Field/FileIdModifier.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Field;
 
-class FileIdModifier extends String {
+class FileIdModifier extends StringHelper {
 	public function __construct($value) {
 		parent::__construct(strtoupper($value), 1);
 
diff --git a/src/Nacha/Field/StandardEntryClass.php b/src/Nacha/Field/StandardEntryClass.php
index ac6dc05..777839d 100644
--- a/src/Nacha/Field/StandardEntryClass.php
+++ b/src/Nacha/Field/StandardEntryClass.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Field;
 
-class StandardEntryClass extends String {
+class StandardEntryClass extends StringHelper {
 
 	const ACK = 'ACK';
 	const ADV = 'ADV';
diff --git a/src/Nacha/Field/String.php b/src/Nacha/Field/StringHelper.php
similarity index 97%
rename from src/Nacha/Field/String.php
rename to src/Nacha/Field/StringHelper.php
index 72817d4..a820c73 100644
--- a/src/Nacha/Field/String.php
+++ b/src/Nacha/Field/StringHelper.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Field;
 
-class String {
+class StringHelper {
 
 	protected $value;
 	protected $length;
diff --git a/src/Nacha/Record/BatchFooter.php b/src/Nacha/Record/BatchFooter.php
index 6f71e16..05605f5 100644
--- a/src/Nacha/Record/BatchFooter.php
+++ b/src/Nacha/Record/BatchFooter.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Record;
 
-use Nacha\Field\String;
+use Nacha\Field\StringHelper;
 use Nacha\Field\Number;
 
 class BatchFooter {
@@ -21,7 +21,7 @@ class BatchFooter {
 
 	public function __construct() {
 		// defaults/optional
-		$this->reserved = new String('', 6);
+		$this->reserved = new StringHelper('', 6);
 		$this->setEntryAddendaCount(0);
 		$this->setMessageAuthenticationCode('');
 		$this->setTotalDebitAmount(0);
@@ -53,7 +53,7 @@ public function setCompanyIdNumber($companyIdNumber) {
 		return $this;
 	}
 	public function setMessageAuthenticationCode($messageAuthenticationCode) {
-		$this->messageAuthenticationCode = new String($messageAuthenticationCode, 19);
+		$this->messageAuthenticationCode = new StringHelper($messageAuthenticationCode, 19);
 		return $this;
 	}
 	public function setOriginatingDfiId($originatingDfiId) {
diff --git a/src/Nacha/Record/BatchHeader.php b/src/Nacha/Record/BatchHeader.php
index 356fd59..f7d2a07 100644
--- a/src/Nacha/Record/BatchHeader.php
+++ b/src/Nacha/Record/BatchHeader.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Record;
 
-use Nacha\Field\String;
+use Nacha\Field\StringHelper;
 use Nacha\Field\Number;
 use Nacha\Field\CompanyName;
 use Nacha\Field\StandardEntryClass;
@@ -83,11 +83,11 @@ public function setCompanyName($companyName) {
 		return $this;
 	}
 	public function setCompanyDiscretionaryData($companyDiscretionaryData) {
-		$this->companyDiscretionaryData = new String($companyDiscretionaryData, 20);
+		$this->companyDiscretionaryData = new StringHelper($companyDiscretionaryData, 20);
 		return $this;
 	}
 	public function setCompanyId($companyId) {
-		$this->companyId = new String($companyId, 10);
+		$this->companyId = new StringHelper($companyId, 10);
 		return $this;
 	}
 	public function setStandardEntryClassCode($standardEntryClassCode) {
@@ -99,15 +99,15 @@ public function setCompanyEntryDescription($companyEntryDescription) {
 		return $this;
 	}
 	public function setCompanyDescriptiveDate($companyDescriptiveDate) {
-		$this->companyDescriptiveDate = new String($companyDescriptiveDate, 6);
+		$this->companyDescriptiveDate = new StringHelper($companyDescriptiveDate, 6);
 		return $this;
 	}
 	public function setEffectiveEntryDate($effectiveEntryDate) {
-		$this->effectiveEntryDate = new String($effectiveEntryDate, 6);
+		$this->effectiveEntryDate = new StringHelper($effectiveEntryDate, 6);
 		return $this;
 	}
 	public function setSettlementDate($settlementDate) {
-		$this->settlementDate = new String($settlementDate, 3);
+		$this->settlementDate = new StringHelper($settlementDate, 3);
 		return $this;
 	}
 	public function setOriginatorStatusCode($originatorStatusCode) {
@@ -115,7 +115,7 @@ public function setOriginatorStatusCode($originatorStatusCode) {
 		return $this;
 	}
 	public function setOriginatingDFiId($originatingDFiId) {
-		$this->originatingDFiId = new String($originatingDFiId, 8);
+		$this->originatingDFiId = new StringHelper($originatingDFiId, 8);
 		return $this;
 	}
 	public function setBatchNumber($batchNumber) {
diff --git a/src/Nacha/Record/CcdEntry.php b/src/Nacha/Record/CcdEntry.php
index dc9f45a..e66890d 100644
--- a/src/Nacha/Record/CcdEntry.php
+++ b/src/Nacha/Record/CcdEntry.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Record;
 
-use Nacha\Field\String;
+use Nacha\Field\StringHelper;
 use Nacha\Field\Number;
 
 // Cash Collection and Disbursement Entry (CCD)
@@ -48,19 +48,19 @@ public function setCheckDigit($checkDigit) {
 		return $this;
 	}
 	public function setReceivingDFiAccountNumber($receivingDFiAccountNumber) {
-		$this->receivingDFiAccountNumber = new String($receivingDFiAccountNumber, 17);
+		$this->receivingDFiAccountNumber = new StringHelper($receivingDFiAccountNumber, 17);
 		return $this;
 	}
 	public function setReceivingCompanyId($receivingCompanyId) {
-		$this->receivingCompanyId = new String($receivingCompanyId, 15);
+		$this->receivingCompanyId = new StringHelper($receivingCompanyId, 15);
 		return $this;
 	}
 	public function setReceivingCompanyName($receivingCompanyName) {
-		$this->receivingCompanyName = new String($receivingCompanyName, 22);
+		$this->receivingCompanyName = new StringHelper($receivingCompanyName, 22);
 		return $this;
 	}
 	public function setDiscretionaryData($discretionaryData) {
-		$this->discretionaryData = new String($discretionaryData, 2);
+		$this->discretionaryData = new StringHelper($discretionaryData, 2);
 		return $this;
 	}
 	public function setAddendaRecordIndicator($addendaRecordIndicator) {
diff --git a/src/Nacha/Record/DebitEntry.php b/src/Nacha/Record/DebitEntry.php
index 992311e..de55674 100644
--- a/src/Nacha/Record/DebitEntry.php
+++ b/src/Nacha/Record/DebitEntry.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Record;
 
-use Nacha\Field\String;
+use Nacha\Field\StringHelper;
 use Nacha\Field\Number;
 
 // PPD, TEL, WEB debit
@@ -48,19 +48,19 @@ public function setCheckDigit($checkDigit) {
 		return $this;
 	}
 	public function setDFiAccountNumber($dFiAccountNumber) {
-		$this->dFiAccountNumber = new String($dFiAccountNumber, 17);
+		$this->dFiAccountNumber = new StringHelper($dFiAccountNumber, 17);
 		return $this;
 	}
 	public function setIndividualId($individualId) {
-		$this->individualId = new String($individualId, 15);
+		$this->individualId = new StringHelper($individualId, 15);
 		return $this;
 	}
 	public function setIdividualName($idividualName) {
-		$this->idividualName = new String($idividualName, 22);
+		$this->idividualName = new StringHelper($idividualName, 22);
 		return $this;
 	}
 	public function setDiscretionaryData($discretionaryData) {
-		$this->discretionaryData = new String($discretionaryData, 2);
+		$this->discretionaryData = new StringHelper($discretionaryData, 2);
 		return $this;
 	}
 	public function setAddendaRecordIndicator($addendaRecordIndicator) {
diff --git a/src/Nacha/Record/FileFooter.php b/src/Nacha/Record/FileFooter.php
index cadaccb..f6a23fa 100644
--- a/src/Nacha/Record/FileFooter.php
+++ b/src/Nacha/Record/FileFooter.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Record;
 
-use Nacha\Field\String;
+use Nacha\Field\StringHelper;
 use Nacha\Field\Number;
 
 class FileFooter {
@@ -18,7 +18,7 @@ class FileFooter {
 
 	public function __construct() {
 		// defaults
-		$this->reserved = new String('', 39);
+		$this->reserved = new StringHelper('', 39);
 		$this->setBatchCount(0);
 		$this->setBlockCount(0);
 		$this->setEntryAddendaCount(0);
diff --git a/src/Nacha/Record/FileHeader.php b/src/Nacha/Record/FileHeader.php
index 511886f..2bfa09c 100644
--- a/src/Nacha/Record/FileHeader.php
+++ b/src/Nacha/Record/FileHeader.php
@@ -2,7 +2,7 @@
 
 namespace Nacha\Record;
 
-use Nacha\Field\String;
+use Nacha\Field\StringHelper;
 use Nacha\Field\Number;
 use Nacha\Field\RoutingNumber;
 use Nacha\Field\FileIdModifier;
@@ -56,11 +56,11 @@ public function setImmediateOrigin($immediateOrigin) {
 		return $this;
 	}
 	public function setFileCreationDate($fileCreationDate) {
-		$this->fileCreationDate = new String($fileCreationDate, 6);
+		$this->fileCreationDate = new StringHelper($fileCreationDate, 6);
 		return $this;
 	}
 	public function setFileCreationTime($fileCreationTime) {
-		$this->fileCreationTime = new String($fileCreationTime, 4);
+		$this->fileCreationTime = new StringHelper($fileCreationTime, 4);
 		return $this;
 	}
 	public function setFileIdModifier($fileIdModifier) {
@@ -80,15 +80,15 @@ public function setFormatCode($formatCode) {
 		return $this;
 	}
 	public function setImmediateDestinationName($immediateDestinationName) {
-		$this->immediateDestinationName = new String($immediateDestinationName, 23);
+		$this->immediateDestinationName = new StringHelper($immediateDestinationName, 23);
 		return $this;
 	}
 	public function setImmediateOriginName($immediateOriginName) {
-		$this->immediateOriginName = new String($immediateOriginName, 23);
+		$this->immediateOriginName = new StringHelper($immediateOriginName, 23);
 		return $this;
 	}
 	public function setReferenceCode($referenceCode) {
-		$this->referenceCode = new String($referenceCode, 8);
+		$this->referenceCode = new StringHelper($referenceCode, 8);
 		return $this;
 	}
 
diff --git a/test/Nacha/Field/StringTest.php b/test/Nacha/Field/StringTest.php
index 1a4bf5c..6f12b46 100644
--- a/test/Nacha/Field/StringTest.php
+++ b/test/Nacha/Field/StringTest.php
@@ -6,7 +6,7 @@ class StringTest extends \PHPUnit_Framework_TestCase {
 
 	public function testPadding() {
 		// given
-		$str = new String('Hello World', 32);
+		$str = new StringHelper('Hello World', 32);
 
 		// then
 		$this->assertEquals('Hello World                     ', (string)$str);
@@ -14,7 +14,7 @@ public function testPadding() {
 
 	public function testOptional() {
 		// given
-		$str = new String('', 10);
+		$str = new StringHelper('', 10);
 
 		// then
 		$this->assertEquals('          ', (string)$str);
@@ -29,7 +29,7 @@ public function testValidCharacters() {
 		}
 
 		// when
-		$str = new String($allValidAsciiChars, strlen($allValidAsciiChars));
+		$str = new StringHelper($allValidAsciiChars, strlen($allValidAsciiChars));
 
 		// then
 		$this->assertEquals($allValidAsciiChars, (string)$str);
@@ -39,7 +39,7 @@ public function testValidCharacters() {
 	 * @expectedException \Nacha\Field\InvalidFieldException
 	 */
 	public function testNotString() {
-		new String(12, 32);
+		new StringHelper(12, 32);
 	}
 
 	public function testInvalidCharacter() {
@@ -48,7 +48,7 @@ public function testInvalidCharacter() {
 			$invalid = 'validtext'.chr($ascii);
 
 			try {
-				new String($invalid, strlen($invalid));
+				new StringHelper($invalid, strlen($invalid));
 
 				$this->assertTrue(false, 'Should throw an exception for invalid ASCII:'.$ascii);