... looking Certificate:ISO9001 Features:Zinc Alloy straight Grain Handle Konbs with inner thread/leadscrew1.Material:Plastic, bakelite, zinc-alloy steel, polyamide ... , Engineers and after sale worker to deal with such things.In case this thing happened, we will deliver the ... serve for you with the good quality and competitive price. Zinc Alloy Straight Grain Handle Knobs with Brass inner thread/leadscrew