The composition of TC4 titanium alloy material is Ti--6Al-4V, which belongs to (a+b) type titanium alloy, which has good comprehensive mechanical and mechanical properties and high specific strength. The strength sb=1,012MPa of TC4, the density g=4.4X103, the specific strength sb/g=23.5, while the specific strength sb/g of alloy steel is less than 18.Titanium alloys have low thermal conductivity. The thermal conductivity of titanium alloy is 1/5 of steel, 1/13 of aluminum alloy, 1/25 of copper, and the thermal conductivity of TC4 = 7.955W/m.K. The above data is for reference only.The product is made of bimetallic hose, which has higher hardness and wear resistance than ordinary hoses.The inside of the product is processed by a special process, and the inner wall is smooth and free of burrs; compared with the ordinary throat, the resistance of the printing retraction is reduced by 90%, and the printed product is more precise and delicate.The bimetallic throat HEATBREAK branch design, the front end is made of titanium gold, and the rear end is made of copper alloy material, which has a strong thermal barrier ability.Suitable for 1.75mm consumablesFor MK7/8 CR 10 / Ender 3D Printer seriesFor Ender 3/3 Pro/3 X, Ender 5/5 Plus/5 Pro, CR-10, CR-10 V2, CR-10 Max, CR 10, CR-10 Mini, CR-10S, CR 10S Pro, CR-10 Plus, CR-X, CR 20.Colour: copper-coloredMaterial: titanium alloy + copperPackage Contents:2 * Titanium alloy red copper bimetallic hoseOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.