COMPATIBLE: ZIMMATIC, LOCKWOOD, OLSON, PIERCE, REINKE * Universal mount bolt pattern * Full Cycle expansion chamber * Tapered roller bearings * 50 to 1 and 52 to 1 worm gear ratio UV. * Input shaft fitted with Uv resistant dust seals * High strength steel worm and output shaft * Includes rib neck carriage bolts with wheel nuts * each gearbox filled with extreme pressure multi-purpose oil Disclaimer: CenterpivotParts Outlet is an independent parts supplier and is not affiliated with Valley, Lindsay/Zimmatic, Reinke, Pierce, Olson or Lockwood. These parts are not manufactured by Valley, Lindsay/Zimmatic, Reinke, Pierce, Olson or Lockwood and is not certified by Valley, Lindsay/Zimmatic, Reinke, Pierce, Olson or Lockwood or any other pivot manufacturer gearboxes For More Info or to order call 620-338-0894