BIG BORE 50MM 52MM Cylinder Piston Ring Gasket Oil Seal Valve Compatible with HUSQVARNA 61 268 272 272K 272XP Chainsaw Parts NIKASIL PLATEDCompatible with HUSQVARNA 272 272K 272XP 268 61 ChainsawCompatible with Replace Cylinder OEM : 503758172 / 503 75 81 72Cylinder Bore: 50mm 52mmInclude: 1 x Cylinder, 1 x Piston, 1 x Pin, 1 x Piston Ring, 2 x Circlip, 2 x Needle Bearing, 1 x Spark Plug, 1 Pair Oil Seal, 1 x Gasket Kit , 1 x Decompression Valve