Belt Pulley 1.V-belts: SPZ, SPA, SPB, SPC; A, B, C, ... nylon, aluminum 3.OEM,fast offer Belt Pulley's feature:1. European standard: a. V-belt pulleys for taper bushings: SPZ, ... grooves b. Adjustable speed V-belt pulleys and variable speed pulleys c. Flat belt pulleys and conveyor belt pulleys 2. American standard ... BK, BKH,2BK, 2BKH, 3BK c. Adjustable sheaves: poly V-pulley, multi-pitch H, L, J, K and M 3 ...