This V-Groove Drive Pulley is recommended as an OEM Replacement only. It has a hub attached and the inside diameter is 1''. This V-Groove Drive Pulley has an integral keyway and will only work on shafts that require a keyway. There are no set screw holes. This part is Painted Black to prevent rusting. Additional Features: Made of Steel Works with 4L/A|5L/B belts Integral keyway Direct OEM Replacement for: John Deere: AM141853