Features: Silicone cover for Hot End. 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. Specification: Color: Yellow, Green, Pink, White (Optional) Material: Silica gel Length: 25 mm Width: 18 mm Height: 17 mm Package weight: 4g Package Included: 1 x Silicone Case (Aluminum Block Not Included) Notice: 1. Manual measuring, please allow 1 ~ 3 mm error, thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. Please understand, thank you 1Silicone cover for E3D V6 PT100 Hot End. 2These cases will keep your nozzle clean and free of burnt on blackened plastic. 3These also offer a huge boost in temperature stability, particularly if you use high airflow cooling around the nozzle to cool the print. 4Made of a heat-resistant, non-stick silicone material, rather than molten plastic. 5This really helps with sticky materials like Co-Polyesters and filled materials that like to build up on nozzles.