... Adjustment Handle Knob 1.Material:zinc alloy+Steel 2.Finsh: Black/CP, GP/CP, PC/CP 3.Certificate: ISO9001, ... for furniture and Cabinet 1.Material: Bakelite, steel, plastic, zinc alloy, aluminum2.Surfaced process: Zinc alloy: special black, oranger, red, ... silver or blue plastic coated Bakelite: black / orange, glossy finish Steel: sand ...