Second oversize replacement piston for the MCK3 cylinder kit for Primavera. Comes with wrist pin, circlips, and rings. Piston kits for your 135, 166, and 210 Malossi cylinder kits. Replacement kit comes with piston, rings, pin, and circlips. Please specify which cylinder kit you have and whether you need on size or oversize when ordering. Also, on some of the 210 kits pistons can be sized by a letter i.e. A, B, C, etc? This should be visible on your old cylinder and old piston, although not all kits have this.