Wossner is Germany's finest aftermarket forged piston and rod manufacturer and have over 25 years of experience in the high-performance racing industry. Top European racers and FIM World Champions rely on Wossner for only the best pistons, rods and customer service. Features: In-house designed and manufactured; all forgings are produced in Wossner's company-owned forging operation 4-stroke pistons are made using a double-bridged forging design Lightweight pistons with the tightest piston-wall clearances in the industry give you a quieter running engine Wossner pistons are used by leading Supercross, Arenacross and MX GP teams Made in Germany Specifications: Piston Size: 67.45mm Oversize: +0.01mm Number of Rings: 2 Replacement Rings: RSB6750 Replacement Wrist Pin: WP033 Replacement Circlip: CW18 Replacement Needle Bearing: N1020 NOTE: Wossner Piston Kits include the Piston, Wrist Pin, Circlips & Rings, Needle Bearings are not included.