DOP83-300S Simplicity Transmission Oil Filter fits many brands with hydro-static transmissions. 28 Micron. 3/4-16 Mounting thread, 2-13/16" Mounting seal OD, 8-11PSI relief pressure, anti drain valve, OD: 3-13/16", 3-3/4" Ht. Replaces # 171439/1650954.