Genuine Wanhao upgrade kit for upgrade your i3 to i3 V2.1 spec.
This kit upgrades the linear bearings to the stronger smoother type 45mm LM8UU bearings. This greatly reduces belt wear and also gives more reliability and a smooth print finish.
Also included in this kit is the new style bed levelling thumb screws. These solid metal turn wheels are lots easier to adjust and are not as fiddly as the traditional wingnuts.
A 0.4mm nozzle cleaning drill completes this set, to help keep your nozzle clean of debris.