brand new and high quality.Features:For the Heatsink:It is made from Aluminum alloy material. Drilled with high precision and black surface treatmentFor the Heatbreak:Thermal heat break is made from for Titanium Alloy TC4 to provide excellent thermal isolation between heater and cooling block. for Titanium is extremely strong material and offers almost 3x lower thermal conductivity than stainless steel, creating more defined meltzone.This design with Neck for prusa mini printer is to solve the heatcreep issues. It would be better if you can apply some thermal paste to properly fit the heatbreak into the for prusa mini heatsink.Notes on twisting the heatbreak:To address the heat creep issue the design features a narrower section with thinner walls. When removing the heater block or changing nozzles, caution is required.Before removing the heater block from the heatbreak (or vice versa), heatup the nozzle, hold the heater block and release some tightening pressure from the nozzle. Let the whole group cool down. After, you can simply unscrew the heatbreak from the heater block.For the nozzle:Nickel plating has High hardness and wear resistance, Apply Nickel plating on the nozzle surface can reduce the friction, to make it smoother when inputing filamentThe nozzle material is brass to keep good thermal conductivity, the Nickel coating can increase the for lifetime of the nozzle and prevent the nozzle surface Oxidation.Specifications:Material: Plastic, MetalLength: approx.60mm/2.36inColor: As pictures shownApplicable Models: for Prusa MiniQuantity: 1 SetNote:Please allow 01cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Includes:1 Set x Mini Hotend Kit (other accessories demo in the picture is not included.)