This V-Groove Drive Pulley works both as an OEM replacement and as a general purpose pulley for power transmission such as compressors, industrial fans, lawn mowers, snowblowers, and electric motors. It does not have a hub attached. The inside diameter is 1 1/4''. This pulley does not have a keyway. There are no set screw holes. Additional Features: Made of Steel Works with 4L/A|5L/B belts Heavy duty split steel Direct OEM Replacement for: Bercomac: 103288-02