5 flexible stainless steel needles for gentle maintenance of your nozzles and difficult to reach places V6 Nozzles: Material: brass, Thread type: M6, Output diameter: 0.4 mm; Input filament diameter: 1.75 mm, Compatible: V5 and V6 extruder hotend Filament Silicone socks: Will keep your heater block clean and free from burnt and blackened plastic.Helps to keep the hotend temperature extremely stable, particularly if you use high-airflow cooling around the nozzle to cool the print.