This item is dual Z kit with lead screw nut, which is made of for practicable and use. It is practical 3D printer accessories, easy to install and replace, bring huge convenience to you, high hardness, and excellent to use. Features - Color: Assorted color. - Material: Metal. - Size: 4.70X4.00X1.80cm/1.85X1.57X0.71inch. - This dual Z kit is made from for durability and . - Wonderful detail design and good craftsmanship will ensure its durability and practicality. - The 3D printer dual Z upgrade kit adopts advanced processing technology, useful and excellent. - The sturdy Z upgrade kit is easy to use, simple design, great and useful 3D printer accessory. - It is lightweight, easy and convenient to use and store when not in use without any effort. Package list: 1 x stepper motor 2 x lead screw bearing guides 1 set x power supply holder 1 x coupler 1 lead screw bracket with brass nut 1 x dual Z stepper cable 1 motor bracket 1 x lead screw 1 set x screw tools