Features <> Monkey Type Z forged piston, 6 V Aftermarket Parts Type Z forged pisutonringu lace top rings... 1 case <> Includes ND RING base- 1 case oil rings... 1 case Third rings... Size 2 case <> Top ring – 0.76(mm) φ 51.5 MS Φ 51.5 – 0.75(mm) Oil Rings Φ 51.5 – 1.33(mm) Third rings Φ 51.5 – 0.31(mm) <> Monkey Type Z forged piston or other 88cc (Φ 52) Piston with Rings of the same size