Catalog > Internet of Things (IOT) Related Products > More Platforms 3D Printer Bed Leveling Spring Set 3D Printer Bed Leveling Spring Set CMU SCREW LEVELLING SPRING 4 SET 3D PRINTER BED LEVELING SPRING SET OF 4. M3 SCREW Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features 3D Printer Bed Leveling M3 Screw with SPRING and Hand KnobThese M3 Springloaded nut and bolt kit makes leveling a 3D Printer bed much easier.