1) European standard:    
 
a) V-belts pulley for taper bushing: SPZ, SPA, SPB, SPC; up to 10 grooves.   
b) Adjustable speed V-belt pulleys and variable speed pulleys.   
c) Flat belt pulleys and conveyor belt pulleys.
 
2) American standards:   
 
a) Sheave for taper bushing: 3V, 5V, 8V    
b) Sheaves for QD bushings: 3V, 5V, 8V   
c) Sheaves for split taper bushing: 3V, 5V, 8V  . 
d) Sheave for 3L, 4L or A, and 5L or B belts: AK, AKH, 2AK, 2AKH, BK, BKH,2BK, 2BKH, 3BK   
e) Adjustable sheave: poly V-pulley, multi-pitch H, L, J, K and M.