... . silver, orange and etc Appearance: bright, no burr looking Certificate:ISO9001 Features:Zinc Alloy straight Grain Handle Konbs with inner thread ... /leadscrew1.Material:Plastic, bakelite, zinc-alloy steel, polyamide, stainless steel and etc.2.Standard :DIN ... you with the good quality and competitive price. Zinc Alloy Straight Grain Handle Knobs with Brass inner thread/leadscrew