The inner wall of the titanium is very smooth so that the filament can pass through and reduce clogging., used for the 1., 75mm V6 Heatsink , Volcano Hotend Bimetal Heat Break E3D V6 Volcano Hot End for Prusa I3 MK3/ MK3S 1.75mm Filament Titanium Alloy Copper Plated Bimetal Throat 2 Pack Bimetal Copper Titanium Heatbreak HoCenWay High Temperature Compatible With V6 Hotend Prusa I3 MK3 MK3S Volcano Hot End 3D Printer(Threaded Version V6 Hotend Heatbreak Upgrade Add to cart Pack of 2pcs 3D Printer Super Smooth Titanium Alloy Heat Break All Metal Thermal Barrel Feeding Tube Heatbreak Throat for 1.75MM V6 HOTEND and Titan Aero Extruder use Add to cart 4Pcs Titanium Alloy V6 Heatbreak All Metal Heat Break Thread Throats for V6 Volcano Hotend Extruder Prusa I3 MK3/MK3S 1.75mm Filament Add to cart It is composed of 2 parts. Compatible with V6 Volcano Hotend, with Prusa I3 MK3/MK3S 3D Printers. The part connecting the nozzle is made of titanium alloy, which has low heat conduction. Two components with different thermal conductivity improve heat dissipation efficiency It has two components with different thermal conductivity.