NAMURA PISTON RING SET 47.50MM HONDA CR85R 03-07 YAMAHA YZ85 02-21Piston Ring Namura will fit OEM Prox Wossner & Vertex pistons Features: Namura rings replace the ones included with Namura piston assemblies They also match the OEM design for use on the original pistons unless noted Rings are sold in a set for one piston Carefully developed for the highest level of quality Unsurpassed in functionality and reliability Ready to serve reliably for years to come