Features:-No Toxic and tasteless;-Environmental and small;-Large transmission power;-Stable performance.Specifications:Material: Stainless steel lead screw, brass nut, Zinc Alloy Bearing BracketScrew diameter: 8mmLength: 600mmScrew spacing: 2mmLead of thread: 8mmFit for 3D printer; engraving machine; XYZ module; slider; lifts ect.Package Included:1x 600mm lead screw1x Brass Nut2x Bearing Bracket