Air Compressor Motor Drive Pulley PU012700AV CAMPBELL HAUSFELD OD:3.25-ID:5/8" AK Finished Bore Sheaves for (3L, 4L or A Belts) AK Sheaves are accurately machined from fine grained cast iron, CAMPBELL HAUSFELD : PU012700AV Fixed Bore 1 GRV. Sheave for (2L 3L 4L or A Belts) Grooves One Pulley Diameter 3.25" Bore 5/8" Pitch Diameter 2.8 Keyway 3/16 x 3/32 Weight 1.2LB