[Premium ]: MK8 extruder nozzles are made of hardened stainless steel, harder than normal brass nozzles,hardened stainless steel is durable to use for a long time with the good heat resistance and corrosion resistance, abrasion resistance performance.Tips:The heating speed of steel is slower than that of copper, it is more durable [Compatibility]: MK8 3D printer nozzles are compatible with 1.75mm for 3D printers, for -10 all-metal hotend, -2/ -3/ -3 pro/ -5, . [Integrated molding]:The integrated molding technology ensures that the nozzle is and free of burrs, avoids clogging during the printing process, and the nozzle error is less than 0.02mm, providing you a perfect and printing effect, and also increases the service life. [Value for money]:Package includes 10 x 0.4mm 3D printer hardened stainless steel nozzles,so you will have enough nozzle for replacement, and 3 x nozzle cleaning needles, which has strong flexibility and durability, easy to bend the needle into a nozzle without breaking, good tools for nozzle clogging clean. Colour:Silver :metal Package Contents: 10 x 0.4mm Hardened stainless steel for MK8 Hotend 3 x nozzle cleaning needles 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.