【Durable Material】Throat Tube is made of high quality metal, high temperature resistance, sturdy and durable, keeps stable and reliable performance. 【Anti Blocking Design】Tube effectively prevents heat transfer, avoids material swelling and clogging when the printer is working. 【Easy Installation】This throat nozzle is a direct Replace for old or damaged fittings. 【Metal Throat Tube】The inner wall of the titanium is very smooth so that the filament can pass through and low clogging. 【Application】Widely used for Ender 3, for Ender 3 Pro, for CR10S, for CR-6 SE and other 3D Printer. Specification: Material: Metal Size Chart: Hexagonal (For V6): 5.5mmx24.17mm/0.22inchx0.95inch 4.1: 27mmx7mm/1.06inchx0.28inch 1.75: 27.5mmx7mm/1.08inchx0.28inch Smooth (For V6): 20.5mmx6.95mm/0.81inchx0.27inch Thread (For V6): 22mmx5.5mm/0.87inchx0.22inch Package Includes: 1 Throat(6 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.