Features: brand new and high quality High-quality workmanship, e performance of heatbreak is ecellent and it will not be surpassed . "Bi-Metal Heatbreak" It has two components wi different ermal conductivity. Its ermal blocking front end is made of for titanium alloy and e back end is made of copper alloy material. It has a strong ermal blocking ability. e oo surface version of Heatbreak is also e standard size for E3D V6 450-rated Bi-Metal Heatbreak melts filament faster and conducts 60% less heatacross e Break Zone an competing Heatbreaks Fit for 1.75mm filament, oo version/ readed version for your reference Specifications: Item: Bi-Metal Heatbreak Specification: For E3D V6 Hotend Block Used for: 1.75mm Filament Material: for Titanium & Copper Alloy Bi-Metal Total Leng : Appro 22mm(readed Version) / 20.5mm(oo Version) Type: oo Version/ readed Version( Optional) Bi-Metal Heatbreak (readed 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(oo 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 /CR-10 /CR-10S/CR-10S PRO/CR-20/CR-20 PRO for Tron-y 5S/Tron-y Y2 PRO/TEVO Tornado/Alfawise U20/Lotma SC-10 Note: Due to e problems of lighting effects and shooting angles, ere will be certain tolerances in e product, please understand. Please allow 0-1cm error due to e manual measurment. Package includes: 1 Bi-Metal Heatbreak