(1) The product material is bimetallic throat, which has higher hardness than ordinary throat.More wear-; (2) The inside of the product has been treated with a special process, and the inner wall is smooth and free of burrs; compared with ordinary throat the resistance of printing withdrawing is reduced by 90%,and the printed product is more precise and more delicate. (3) The bimetallic throat heatbreak branch design, the front end is made of titanium, the back end is made of copper alloy material and has strong thermal barrier ability. CR10 Heat Break Throat 1.75mm Copper Plating Tube For 3 -10 Hotend 3D Printer Applicable filament: 1.75mm Note:Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Photo Color Material:copper Package Contents: 2 x CR10 hoses Only the above package content, other products are not included. Note: Light reflection 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.