AK71H Cast Iron sheaves Pulley for V-belt size 3L, 4L OD 7" Single Groove Pulley AK71HAK71H Cast Iron Pulley for V belt size 3L, 4L OD 7" Single Groove Pulley AK71H Outside diameter: 7" inch Length through bore: 1. 1563" inch Belt section size: 3L, 4L Material : Cast Iron One pulley A Section Groove 1 Outside Dia. 3. 05" Req. Bushing H 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