These wheels

nozzle or similar

) One part consists of a magnetic plate

This V6 Steel Nozzle is designed to deliver exceptional precision and durability for your Prusa i3 MK2

On the other hand

Phaetus Dragonfly Hotend BMO Raise3D - Filament These wheelsPhaetus Dragonfly Hotend BMO All metal kit with temperature resistance up to 500. *AII metal kit with overall high temperature resistance up to 500. *The hot end is mainly composed of copper alloy material, which has the advantage of faster heating and better heat dissipation. *Conical mounting of heatsinks and heat sinks provides perfect heat dissipation. *The inner hole roughness of heat breaks Ra0. 3, which enables smoother movement of the