... corner:Material: zinc alloy, stainless steel, Q235Color: silver5. Top hinge parts: zinc alloy stamping, Q235 axis pin, spring combination, outside ... is plastic cover6. Bottom hinge: 08F stamping, spary, Q235 axis, plastic cover combination7. ... alloy stamping, trivalent chromium electroplated8. Tilt and turn hinge: Q235 steel belt, stamping, elctroplated