materials: 3D printer nozzles have good wear resistance, heat resistance and resistance. 3D printing is suitable for materials from PLA and ABS to carbon fiber at high temperatures. Easy to use: This hardened tool steel nozzle has good toughness and hardness. It is not only suitable for common 1.75mm 3D printer filaments, but also can print carbon fiber, glass fiber, etc.; the inner wall of the nozzle is smooth and free of burrs, and has a low viscosity coefficient. You provide smooth extrusion. trusion Effect and Making products have very good texture Compatibility: These 3D printer nozzles are compatible with for the MK8 Hot-end of printers, such as for -2/ -3/ -3 pro/ -5, and also suitable for -10 all-metal hot-end, Prusa i3 , Anet A8, Reprap, etc. The color of the tube cover is random and cannot be and specified Material:metal colour:Black + Golden Package Contents: 7 x 0.4mm hardened steel 3D printer nozzle 2 x (0.2 mm+0.3 mm+0.5 mm+0.6 mm+0.8 mm+1.0 mm+0.4 mm) brass pointed nozzle 2 x (0.2 mm+0.3 mm+0.5 mm+0.6 mm+0.8 mm+1.0 mm+0.4 mm) brass nozzle 5 x 0.15mm nozzle cleaning needle (with storage cylinder) 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.