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. Its thermal blocking front end is made of for titanium alloy and the back end is made of copper alloy material. It has a strong thermal blocking ability. The smooth surface version of Heatbreak is also the standard size for Cr10 printers 450℃-rated Bi-Metal Heatbreak melts filament faster and conducts 60% less heatacross the Break Zone than competing Heatbreaks Specifications: Item: Bi-Metal Heatbreak Specification: For CR-10 TCrazy Heat Break Hotend Heater Block Material: for Titanium & Copper Bi-Metal Total Length : Pls See the Pictures Applicable Model: for CR10 Size:heat end M7, heating end M6 Total Length 27.2mm/1.07in Use for: 1.75mm Filament Package Includes: 1 x Bi-Metal Heatbreak 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.