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 All pistons include piston, ring, wrist pin and pin locks Wossner pistons are used by leading Supercross, Arenacross and MX GP teams Made in Germany Specifications: Piston Size: 45.96mm Oversize: +0.01mm Number of Rings: 1 Replacement Rings: RSB4600 Replacement Wrist Pin: WP058 Replacement Circlip: CW14 Optional Replacement Needle Bearing (not included): N1004 Note: Wossner Piston Kits include the Piston, Wrist Pin, Circlips and Rings. Needle Bearings are not included.