1-1/2" x 6" (stroke length), Hydraulic/Air Cylinder. Uses #1034 clevis. Used on: Three Legged Wonder Gyro Wrap Wave Two x Two Wrap Around Freestanding Two x Two Combo Wash Mod Wrap Around Combo Wash Mod Flex Around Combo Wash Mod Two x Two Airstream Top Nozzle Programmable Side Washer Total Side Coverage Retract Kit for Mounted Side Wheels (early versions)