... .Slide cycling test: 50,000 times 2.Surface:48 hours salt-spray test 3.Drawer slides soft-closing funcation. specifications: drawer ... 1,slide cycing test 50,000 times2,surface:48 hours salt-spray test3,slide surface has good and durable anti-rust ... propertyH450245mm soft-closeing drawer slide 1,structure:inner frame detachable assembly funcation ,adopt 32mm system ...