WINSINN Aluminium 2GT GT2 Synchroon Wiel 16 20 Tanden Tand Bore 5mm 6.35mm 8mm 16T 20T Timing Pulley Voor 3D Printer Breedte 6mm 10mm Timing Belt - RepRap Bowden Prusa I3 Mendel Makerbot Kossel Delta, 20 Teeth 8mm Bore, For 6mm Belt, 5

I probably didnt need to replace the old ones on my neptune 4 pro, but I wanted the shiny! They have worked well and havent had any issues after fifteen to twenty prints now.

Working great just like I need them too. Easy to install for my project. The set screws hold their position well and not have any give to them even after raising them to just about the maximum height you can and tightening them. Will update later if something fails.

These for on my ender 3 V2 z screws. I have dual z screws on mine. My intention was to have a timing belt connecting them. While these worked for that I haven't found the correct belt yet. These will work when I find the belt though.

Good product

I built my own timing belt kit for Ender 3 V2 with Creality dual-z kit. These fit and work well for that application.