The product include nozzle, tube , protective silicone cover case and quick pneumatic connector. Silicone cover made of heat- , non-stick silicone material, much more and functional, heat . The 3D printer nozzles are made of brass material, sturdy and , solve the problem of plugging and missing materials to extent, low thermal conductivity, to corrosion, high abrasion resistance. Features - ColorAssorted Color - Material: Silicone, brass, PTFE. - Size: 8.00X2.50X2.50cm/3.14X0.98X0.98 inch. - PTFE tube has excellent stability and strong acid and alkali resistance. Wide temperature range, can be used at -60 degree centigrade - 260 degree centigrade under normal pressure. - PTFE tube has a very low coefficient of friction, is an excellent friction reducing and self-lubricating material. - has a comfortable feel, high strength, good toughness, and is small and light. - A stainless steel bladed and spring are available. The housing is made of , plastic. There is to the end, can attach it to a key ring, hangs it on a necklace, etc. won't lose it. - Fits 6mm diameter. It can also be used to cut fibers. (Do not use as a wire or a will be boring, however). Package list: 1 x PTFE tube 2 x pneumatic connectors 3 x silicone covers 1 4 x nozzles