lead screw rods 1.Material: C45 2.Weight:230g 3.Type: ... 4.Surface: zinc plated High quality cnc machining small hexagon lead screw rods Our Advantages :Over 12 years experienceHigh quality control ... :Steel, Brass, Copper, Stainless steel, Plastic, Aluminium POM, Delrin, Titanium Alloy etc.2) Surface treatment:Zinc plating, Anodization, Chemical fim, Powder ...