... . insert: brass, stainless steel ISO9001 qualified Features: Dongguan Plastics Straight Grain Burr Handwheels furniture Hardware A.Product specifications1.Screw sizes:M5, M6, M82. ... 16mm,20mm, 25mm, 30mm, 32mm.3.Knob Material:Plastics, bakelite, zinc-alloy steel, polyamide4.Screw Materials: ... free of charges under normal conditions. Dongguan Plastics Straight Grain Burr Handwheels furniture Hardware