Taper bore pulley,taper lock pulley or V belt pulley Four type V Belt:SPZ,SPA,SPB,SPC Outdiameter:50mm-2000mm grooves: 1-10 European standard pulley These pulleys with a taper lock bushing for a tight,wobble-free hold on your shaft.pulleys transfer force from the shaft to a v-belt in a power transmission system,and also help with misalignment. We warmly welcome your inquiry for more detail of these pulley