B&B Manufacturing stocks poly V-belt sheaves in black oxide coated steel for 6 groove, 10 groove, and 16 groove J section poly V-belts. B&B Manufacturing can also produce custom poly V-belt sheaves to match anyone's specific applications and are engineered for rigorous use, long life and minimal maintenance. With quality raw material from suppliers who meet our own strict standards, we can manufacture poly-V sheaves from today's most dependable and versatile materials. B&B Manufacturing Poly-V Sheave, QD® Bore, 3 in Outside Dia, 3.03 in, 6 Grooves, JA Bushing, For Use With: J Section Poly V-Belts, Steel, Black Oxide