... 48 hours salt spray test Product details: Type:Furniture hinge, Hydraulic hinge, Cabinet hinge, door hingeMaterial:SteelStyle:Full overlayOpening angle:90-180°Cup Diamater: ... life.Widening manganese steel spring,can disperse force when the hinge closed. Strengthened spring, thickness 2.5mm instead of common ... ,longer life time,smaller volume Guide: Accessories: 180 degree cabinet hinges and door hinge