[Application]: The titanium alloy and copper heatbreak is compatible with for 3 ,for 3 V2 ,for 3 Pro ,for CR10 Series 3D Printer hotend. [Bi-metal Material Advantage]: The for 3 heat break is made of Titanium Alloy and Copper .Titanium alloy is used to reduce heat conduction upward from the heating block, and gold-plated copper is used to dissipate heat to accelerate heat conduction. [4.1 Bore Style]: The straight through bore of 4.1 makes the filaments will not face any space after extrusion.It can minimize the possibility of clogging,thus helping to print flexible filaments. [Applicable Filaments]: Flexible filaments PLA ABS and other filaments printing temperature is lower than 250. Colour: copper color Material: titanium alloy + copper Package Contents: 3 * Metal Heatbreak Only the above package content, other products are not included. Note: Light 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.