ball knob Material:Plastic, zinc alloy Color: Black, red,champagne and etc. insert: brass, stainless steel ISO9001 qualified Features: Dongguan Plastic Ball Knob furniture hardware A.Product specifications1.Screw sizes:M4, M5, M6, M8, M10, M12, M162.Knob Sizes:16mm,20mm, 25mm, 30mm, 32mm.3.Knob Material:Plastics, bakelite, zinc-alloy steel, polyamide4.Screw Materials:steel,18-8 stainless steel, ...