... series oil cylinder's structure diagram: NumberParts nameNumberParts name1Piston rod's nut9Piston rod O-shaped ring2Piston rod10Piston3Dust-proof ring for axle11Piston sealing ... rod7O-shaped sealing ring15,16,17Plain cushion,elastic cushion, tie rod ,nut8Cylinder tube18,19Elastic cushion,piston fixed nutProduct size: Cylinder bore ...