Per Prusa Core One Ugello Silicone Spazzola Tergicristallo Stampante 3D Ugello Pulitore Strumento
Product suitable for: Prusa Core One. 1 1set 3D Printer Squeezing Head Nozzle Cleaning Silicone Brush. Considering that it bears no load and isn't close to a heat source, PETG should be sufficient. Official Prusa-Printable.