This Cylinder Kit contains Pistons made of hypereutectic aluminum alloy, which makes the piston is inherently stronger. It is also more resistant to expansion and contraction, as well as scuff and corrosion resistant. Efficiency improves due to a better seal between the rings and cylinder wall.Includes:• (1) HCTR116236 Cylinder Sleeve• (1) HCTRE70688 Piston• (1) HCTRE503528 Piston Ring Set• (1) HCTAR98850 O-Ring KitThe HCTRE64509 High Compression Cylinder Kit fits equipment brands such as: John Deere