· 2.Uses advanced and durable gasket, with oil leak rate lower than 1/1000.
· 3.Perfect matching between transmitted piston and gear, with special high intension material to ensure closer to work durable, quite and high efficient.
· 4.Quality carbon steel is used piston structure.
· 5.to allow stable transmission & quiet Can be installed on left/right hand door, without adjustment.
· 6.With two independent adjustable valves, which can be adjusted closing range at 120O -15O and 15O -0O.
