Features: Silicone sleeve for extrusion head hot end, effectively protects the print head from damage and abrasion. From silicone component, it is resistant to highly temperature and abrasion, providing effective protections for the heating block. It support highly temperature environment, maintain stability and durability, suitable for long time printing job. Precise Coverage: The kit is to fit snugly around the hot end of the print head and the heater block, providing all-round protections without compromising on print accuracy. Easy installation allows users to easily replace the kit, while easy cleaning and maintenance prolongs the life of the kit. Specifications: Product Name: Heating Block Silicone Cover for Nozzle Heat Block Cover Product Size: As Pictures Material: Silicone Color：Black Quantity：4/8/12pcs Package Includes: 1Set Heating Block Silicone Covers note: Due to the problems of lighting effects there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.