Specification Brand : Jason Industrial BulletPoint1 : Conforms to RMA Engineering Standard BulletPoint2 : Comparable to Gates, Browning, Goodyear, Dayco, Bando, PIX, Bestorq, Grainger BulletPoint3 : Timing belts are measured by Length, Tooth Pitch, then width. The first number is the length, the letter (and sometimes number) refer to the tooth and the final number is the width. Some are measured in mm and others in inches. If you are not matching a belt number, you should contact us for clarification prior to an order. ExternallyAssignedProductIdentifier1 : 0650003359225 ExternallyAssignedProductIdentifier2 : 650003359225 ItemName : Jason Industrial 300H100 1/2-inch (H) Pitch Standard Timing Belt ItemPackageQuantity : 1 ItemTypeKeyword : industrial-timing-belts Manufacturer : Jason Industrial Material : Synthetic rubber Timing Belt. NumberOfItems : 1 PartNumber : 300H100 ProductDescription : 300H100 ProductSiteLaunchDate : 2012-11-19T21:56:00.728Z UnspscCode : 26111800