AK17-1/2" OD 1.75" Cast Iron ID 1/2" Shaft Pulley Sheave 1 Groove V Style A Belt 4L NewAK17 1 2" OD 1. 75" Cast Iron ID 1 2" Shaft Pulley Sheave Single Groove V Style 3L , A Belt 4L New AK1712 AK17 1 2" Bore Cast Iron Pulley for V belt size 3L, 4L, A B OD1. 7" ID 1 2" Outside diameter: 1. 75" inch Length through bore: 1. 1563" inch Bore: 1 2" inch Belt section size: 3L, 4L Material : Cast Iron Quantity : One pulley 2 Hex set screw 90 Keyway : None