A necessary backup for DIY or fixing your printing project once the stock one breaks. Special design, so will not for other FDM machine like K1 Max Ender 3 E3 5 pro plus SV08 SV07 SV06 5M Pro MK4 MK3S+ A1 Mini X1C P1P P1S. Easy to install: you need to repair the wrench by yourself. Use a hex wrench to remove the three screws on the old chain cover and take out the drag chain cover; Remove the protective cover of the nozzle board; Pull out the nozzle cable; Use a straight screwdriver to pry open the it; Pull out a small section of the nozzle line to make room for operation; Use a hex wrench to remove the three screws of chain; Separate the nozzle line from the it; Install a new one with the screw but please note hole facing backwards. Package includes: 1 Pcs chain cable kit.