Description Are you looking for a professional, yet affordable heat block silicone sleeve? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional heat block silicone sleeve must meet you needs. It is one of the best choices for you. Features - Color: Black. - Material: Silicone. - Size: 2.2 x 2.4 x 1 cm. - These cases will keep your nozzle clean and free of burnt on blackened plastic. - These also offer a huge boost in temperature stability, particularly if you use high airflow cooling around the nozzle to cool the print. - Made of a heat-resistant, non-stick silicone material, rather than molten plastic. - This really helps with sticky materials like Co-Polyesters and filled materials that like to build up on nozzles. - It has the function of heat insulation to prevent scald.Package list: 3 x heat block silicone sleeve