Item Name: Ender 3 Z Axis Stepper Motor Mounting Bracket Kit POM Wheel Version Material: Metal Feature: Can be used to upgrade Ender3(v2), which is using T8 Ender Screw as Z axis. Support T8 Ender Screw 2mm-8mm Pitch. Extruder Head can be installed in both sides. Measurement System: Metric PCs in Item: 1 Set (Left Right bracket) Manufacturer: N/A, Made in China Notes: The Kit comes with T8 4mm Pitch Nuts by default, please specify other pitch (2mm,4mm,8mm or 10mm) in ‘Order Notes’ when checking out if you want to change it.