Metallurgy oil cylinder Aluminium, steel, bronze material ISO9001:2008 approved OEM service, ... machining Weight:50kg-200kg CompanyDalian Wills Machine Co.,LtdProduct nameMetallurgy oil cylinderMaterialSteel,20#,45#,Aluminium, bronzeComposeHydraulic body, Hydraulic piston, Hydraulic RodHydraulic ... is one in which pressure builds up to the highest level with the pushing of the piston. A seal or gasket ...