ball knob, bakelite knob, plastic knob, steel knob Insert : Brass, Stainless Steel or Common Plated steel We are a profession manufacturer in machine accessories for ... ·Material: ABS, Polyamide, Bakelite, Fiberglass ·Fitting: Brass, Stainless Steel or Common Plated steel·Technics: Plastic Injection Process, From 5g~1500g Persist with ...