Stihl TS420 Genuine OEM Piston And Cylinder. Removed from a running saw, good compression. Cylinder feels smooth all around, no gouges. Piston is in good shape, does show marks below the rings but cannot be felt by touch, comes with the rings, c-clips, bearing, wrist pin and base gasket. Compression test showed 150lbs before removal. Shipped using USPS Priority shipping.