This is the Piston with Wrist Pin and for use on the DLE Engines DLE-30cc Gas Engine (DLEG0030). FEATURES: Aluminum construction INCLUDES: One Piston One Piston Pin Two Piston Pin Retainers REQUIRES: Piston Ring, DLEG3005 Installation in the cylinder head SPECS: Length: 33mm (1.3") Diameter: 36mm (1.4") DL POWERPart DLE30-4-0