Stainless steel material, anti-corrosion and high temperature resistance.T8 trapezoidal threaded, uniform force and smooth slide.Suitable for 3D printer stepper motor.Type: Lead Screw RodMaterial: Stainless SteelFeatures: High Temperature Resistant, Acme Threaded, with NutLength: 150mm/5.91", 200mm/7.87", 250mm/9.84", 300mm/11.81", 400mm/15.75", 500mm/19.69" (Approx.)Diameter: 8mm/0.3& 39;& 39; (Approx.)Brass Nut Size: 10mm x 13mm x 22mm/0.4& 39;& 39; x 0.5& 39;& 39; x 0.9& 39;& 39; (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Lead Screw Rod1 x Nut