Package: 5PCS Hardened Steel + 5PCS Stainless Steel + 5PCS Brass High-Temperature nozzles, this kit contains total 15 PCS 0.4 mm nozzles in three materials. 15 PCS Nozzles Kit: nozzles are made of high-quality materials, which has better thermal conductivity and high hardness for better printing. Smooth Inside: Smooth inner wall without burr, minor viscosity coefficient, smoother tapping. Cutting chamfer design, reducing resistance, smooth feeding, barely blocking. Compatible Models: These nozzles kit is compatible with Vyper, Kobra Plus, Kobra Max FDM 3D Printers. Better Compatibility and Applicability: 3D extruder nozzles are compatible with most 1.75mm PLA ABS 3D printers with external M6 thread on the market. Colour:gold+silver+black Material:Metal Size:10.80 x 10.01 x 1.09 cm Package Contents: 15x Nozzles Kit 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.