4PJ 307 closed-loop timing belt, 307mm perimeter, 9.36mm width, 2.34 mm pitch, 4 ribs. Replaces part number is AB-9075047. Compatible with Stanley Bostitch CAP2040P OF, CAP60PB OF, CAP 60P & Husky HH1503TP Air Compressor. Selected high-quality rubber, wear-resistant and durable in use. Inspect belts periodically and replace when worn to maintain peak performance. Please confirm the model before purchasing. MPN AB-9075047 Type Drive Belt Pitch 2.34 mm Ribs 4 Width 9.36mm/0.36inch Circumference 307mm/12.08inch Material Rubber Colour Black Voltage Does not apply Brand Unbranded/Generic MPN AB-9075047 .