Usage Tips:[M6 Thread Nozzle]MK8 extruder nozzles are made of upgraded brass, we provide 4x0.4mm /1x0.6mm /1x0.8mm MK8 nozzles , those ender 3 nozzle set are suitable for Creality Ender 3 Pro /Ender 3 V2 and all M6 thread connections. Before using the ender 3 v2 nozzle ,which is better to use the nozzle cleaning kits to clean the inner wall of the nozzles. [3D Printer Nozzle Wrench 6 in 1]Using this 3d printer nozzel change replacement tools, you can easily to remove the different sizes and types of nozzles , various heater blocks ,PC4-M6 M10 connectors and the other right 3D printer parts. The wrenches is just enough for remove the nozzle and some samll parts use . [5PCS Nozzle Cleaning Needles and 10PCS Nozzle Cleaner PCB Drill Bits ]If the nozzle is blocked, those 3d print nozzle cleaning tool kit can help to clean it easily,make sure to heat the nozzle to 200℃,and then turning the drill bit or needle slightly clockwise,don't insert it directly, it will cause the drill bit and 0.4 mm cleaning needle to break ! [Hotend Cleaning Copper Brush ]The brass bristle is specially designed for 3D printer nozzle hotend cleaning, since it is a copper toothbrush, remember to turn off the power when cleaning the hot end. [3D Printer Nozzle Cleaning Set] We want to make a nozzle kit ,which not only have different nozzles but also can clean and remove and protect the nozzles , .So we have 0.4mm/0.6mm/0.8mm sizes nozzles , nozzle cleaning needles ,copper , PCB drill bits , silicone cover , wrench , tweezers. MK8 3D Printer Nozzles Compatibility for Ender 3/Ender 3 pro/Ender 3 V2/Ender 5 series/Creality CR10 Series/MK8 Makerbot/Prusa i3 met MK3 extruder/Reprap printer/Wanhao 3D printer Note: Due to different production batches, the color of the tweezers is random, don't accept the specified color Colour:Photo Color Material:plastic Package Contents: 10 x 3d printer nozzle drill bits 5 x 0.4mm nozzle cleaning needle