Grooved U Lip Hydraulic Cylinder Piston Rod Ring Gasket Oil Seal, DHS 31.5 * 39.5 * 5/6.5 31.5x39.5x5/6.5 32 * 40 * 5/6.5 32x40x5/6.5 (Size : 31.5x39.5x5x6.5)