Features: brand new and high quality High-quality workmanship, the performance of heatbreak is excellent and it will not be surpassed . "Bi-Metal Heatbreak" It has two components with different thermal conductivity. It is composed of 3 parts. We use a special process to hold them firmly together. You don'for t need to worry about it being damaged. 450-rated Bi-Metal Heatbreak melts filament faster and conducts 60% less heatacross the Break Zone than competing Heatbreaks Fit for 1.75mm filament, Smooth version/ Threaded version for your reference Specifications: Item: Bi-Metal Heatbreak Specification: For E3D V6 Hotend Heater Block Used for: 1.75mm Filament Material: Copper Alloy Bi-Metal Total Length : Approx 22mm(Threaded Version) / 20.5mm(Smooth Version) Type: Smooth Version/ Threaded Version( Optional) Bi-Metal Heatbreak (Threaded Version) for E3D Heatsink for E3D Volcano Heat Block for E3D PT100 Volcano Heat Block for E3D V6 Heat Block for E3D PT100 V6 Heat Block for Prusa I3 MK3/MK3S for Prusa I3 Bear MK3S Bi-Metal Heatbreak(Smooth Version) for Ender 2/Ender 3/Ender 3 PRO/Ender 5/Ender 5 PLUS/Ender 5 PRO/Ender 6 for CR-10/CR-10 mini/CR-10 S4/CR-10 S5/CR-10S/CR-10S PRO/CR-20/CR-20 PRO for Tron-xy X5S/Tron-xy XY2 PRO/TEVO Tornado/Alfawise U20/Lotmaxx SC-10 Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 x Bi-Metal Heatbreak