Features No need to modify the machine, solder, or replace the motherboard. Simply plug the one for two motor cable into the motherboard The upgrade cost is low, and the gantry type 3D printers such as for Ender3 3S are upgraded to dual Z axes to improve the stability of the printer Using aluminum alloy coupling and original 42 stepper motor, which guarantees stable operation Stainless steel material have corrosion resistance, heat resistance, high temperature resistance and ultra low temperature resistance, good comprehensive mechanical properties and high strength Dual Z axes kit contain various accessories, convenient for you to install, easy to operate Specification: Item Type: Dual Z Axes Kit Product Material: Stainless steel + aluminum alloy Product Color: Black Purpose And Function: Upgrade the gantry type 3D printer such as for Ender3 3S to dual Z axes to improve the stability of the printer Package List: 1 x 42-34 Stepper Motor 2 x Bearing Holder 1 Set of Power Supply Holder(2pcs) 1 x Coupling 1 x Fixed Metal Plate 1 x Motor Wire 1 x Motor Mount 1 x Screw Rod 2 x Hex Wrench 14 x Screw 6 x Nut 3 x O Type Gasket 1 x Adapter 1 x Screwdriver 1 x User Manual Note: Please read the instructions carefully for installation. Package List 1 x 42-34 Stepper Motor 2 x Bearing Holder 1 Set of Power Supply Holder(2pcs) 1 x Coupling 1 x Fixed Metal Plate 1 x Motor Wire 1 x Motor Mount 1 x Screw Rod 2 x Hex Wrench 14 x Screw 6 x Nut 3 x O Type Gasket 1 x Adapter 1 x Screwdriver 1 x User Manual