1、Set Contents: Our leveling nut set has 4 leveling nuts, 10 MK8 brass tip nozzles. 2 groups of connectors, 4 each, are extruder connector and hot end connector. 2、Aluminum Alloy and Brass Material: This 3D printer accessory set is made of nice aluminum alloy and brass, with excellent craftsmanship, wear and corrosion resistance. 3、Light Load Spring: The spring in the set is mainly applied for molds machinery, yellow color represents light load, which is very practical for high stress application. 4、Different Threads: The thread of the extruder connector is M6(3mm) with 4mm inner diameter for 4mm outer diameter tube, made of brass, and the thread of the hot end connector is M10(6mm) with 4mm inner diameter for 4mm outer diameter tube, high hardness and oxidation resistance. 5、Wide Application: Our levelling nut set is suitable for CR 10, for Ender 3, for Ender 3 Pro, for Ender 5, for Ender 5 Plus, for 10S Pro, for CR 20.