Manufacturers Part (MPN): ALL18126. Manufactured by: ALLSTAR PERFORMANCE. Fits V-Belt 41in x 1/2in Industrial by Allstar Performance ALL86129. Rivet - 3/8 in Head - 3/16 in Steel Mandrel - 1/4-3/8 in Grip Range - Aluminum - Black Paint - Set of 250 Product Notes (if available).