ACDelco Professional, premium aftermarket Steering Gear Seal Kits include PTFE (polytetrafluoroethylene) seals (for the piston and spool valve), pitman shaft seals, a snap ring, input shaft seals, dust covers, O-rings, and housing-specific O-rings for ACDelco Professional Steering Gears. The parts in these steering gear seal kits are high quality replacements for many vehicles on the road today and meet the performance standards you would expect from ACDelco.