HURI 48mm Cylinder Piston Kit with Gasket Spark Plug for Husqvarna 61 Chainsaw Replace 503 53 20 71 Replacement parts,non original Fit Husqvarna 61 chainsaw,cyliner diameter is 48mm Package include 1pc cylinder + 1pc piston kit + 1pc oil needle + 1pc spark plug + 1pc gasket + 1pc HURI pocket tape Note:you could apply for a full refund if you didn't receive HURI branded pocket tape.