New Pack of Piston Ring Kits Full Gaskets Crankcase Oil Seal fit for Honda Gx390 13hp Engine New high quality replacement parts Fit honda Gx390 13hp The diameter of the piston is 87mm and height is 66.5mm Including 1 piston, 5 rings, 2 circlips, 1 pin, 7 gaskets, 2 crankcase oil seal You will receive exactly what you see on the picture