AK30H Cast Iron Pulley for V-belt size 3L, 4L OD 3" Single Groove Pulley AK30H Outside diameter: 3" inch Length through bore: 1.1563" inch Belt section size: 3L, 4L ,5L Material : Cast Iron One pulley A-Section Groove 1 Outside Dia. 3.05" Req. Bushing H AK30H , MAL30 Light Duty Type 1B Single Groove Bushed Sheave, 1/2 to 1-1/2 in Día Bore, OD: 3.05 in ID: 2.7 in (A/4L) Dia Pitch, 3/4 in W Face AK-H bushing V-Belt sheaves ( pulleys ) is an excellent choice for inch and metric shafts AK Sheaves are accurately machined from fine grained cast iron, statically balanced The belt series most common for this pulley is 4L, or A , AX, V-Belts. Keyway not included