... life time test2: Open angle 110 degrees3.48h salt spray test.4.hydraulic buffer hinge SPEC: Product nameHydraulic soft closing hinge ... kitchen cabinet, book cabinet and furnitureLife timePass 80,000 cycles test under normal loadAdvantages1)Close to 60 degree as hydraulic action ... accessories ,easy for install.3)Pass 48 hour salt spray test ,resist corrosion and rusting.4)The accessories after pressure ...