1. The inner wall of the nozzle The inner wall of the nozzle is : reduce clogging and improve printing accuracy 2. Support printing: PLA, ABS. PETGTPU PP, PC, Nylon, , PEL and other printing consumables 3. More wear-resistant service life: 0.4mm hardened steel nozzle Specifications: silicone sleeve, heating aluminum block, CHT brass spray Colour:black+white Material:Metal Package Contents: 1 x silicone case 1 x hardened steel nozzle hot end 1 x CHT brass nozzle 1.75/0.4mm 1 x CHT brass nozzle 1.75/0.6mm 1 x Thermistor 1 x heating rod 1 x hardened steel nozzle 0.4mm 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.