Feature: 1. APPLICABLE MODEL: Hot end kit nozzle replacement is compatible with for Kobra 3, for Combo, for ACE Pro 3D printer, very useful and versatile 2. THREAD SPECIFICATION: 3D printer volcano nozzle with M6 male thread, easy to use, remove the old hot end nozzle and install the new one to start 3. RUGGED MATERIAL: Nozzles are made of hardened steel and brass. The nozzle hardness is high, not easy to stick the filaments, wear resistance and erosion resistance 4. SUPPORT PRINTING CONSUMABLES: 0.4MM hardened steel nozzle and brass nozzle can be used for 1.75mm PLA, ABS, PETG, TPU, wood filaments, PP, PC, Nylon, PEEK, PEI, etc. 5. HIGH SPEED WITHOUT CLOGGING: Special design, the print head is heated evenly, the inside of the nozzle is flat without burrs, not only reduce resistance, prevent consumables from blocking, but also support high speed printing Specification: Item Type: 3D Printer Nozzles Material: Hardened steel, brass Nozzle Diameter: 0.4mm Application: For Kobra 3 3D printer Support Printing Consumables: PLA, ABS, PETG, TPU, PP,PC, Nylon,PEEK,PEI, etc. Package List: 5 x Brass 0.4mm Nozzles 5 x Hardened Steel 0.4mm Nozzles