... hours salt spray test Product details: Type:Furniture hinge, Hydraulic hinge, Cabinet hinge, door hingeMaterial:SteelStyle:Full overlayOpening angle:90-135 ... .Widening manganese steel spring,can disperse force when the hinge closed. Strengthened spring, thickness 2.5mm instead of ... common one thickness: 1.5mmAdopt advanced hydraulic system,longer life time,smaller volume ...