Silicone material, the nozzle is cleaned without scratches. Easy to clean and long service life. Compatible models: For K1 MAX Nozzle Operation method: Drive the machine to brush the cleaning brush before printing by modifying the slice software script, taking K1 MAX as an example. Modify the position of the starting gcode of the slicing software Change M140 S0 M104 S0 START_PRINT EXTRUDER_TEMP=[nozzle_temperature_initial_layer] BED_TEMP=[bed_temperature_initial_layer_single] to: M140 S0 M104 S0 START_PRINT EXTRUDER_TEMP=[nozzle_temperature_initial_layer] BED_TEMP=[bed_temperature_initial_layer_single] G1 Z10 Y305 X120 F3000 ; Go down G1 Z4 F3000 ; go down G1 X170 F9000 G1 X120 F9000 G1 X170 F9000 G1 X120 F9000 G1 X170 F9000 G1 X120 F9000 G1 X170 F9000 G1 X120 F9000 G1 X170 F9000 G1 X120 F9000 G1 Y280 F9000 Colour:Gray Material:Plastic + Silicone Package Contents: 1 x print parts 3 x Silicone Brush 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.