This Flat Idler 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 comes with a bore adapter to bush down from 17mm to 3/8'' inside diameter. 343255 features a heavy duty sealed radial single-row bearing. Additional Features: Made of Light-Weight Plastic Flanges angled outward to help increase belt life Direct OEM Replacement for: Turfco: 667138