Features: brand new and high quality Effectively keeps heater blocks and nozzles clean Heat-resistant silicone that does not stick to any other composition of print material Has a certain effect of preventing scalding The thermal insulation sleeve has good thermal insulation properties, which can effectively keep the temperature of the heating block stable, especially if the printhead is cooled by a model cooling fan, it can effectively keep the temperature of the heating block from being affected by the surrounding flowing wind, and improve the printing quality. Better temperature resistant, longer service life, support the use of PLA, TPU, HIPS, PETG and other materials Package Includes: 1PC x Silicone Cover Specifications: Product Name: Heating Block Silicon Cover For Ender 3 S1 Heat Block Cover Product Size: As Pictures Material: Silicon Product Weight: 0.003kg Applicable Mechanics: Universal High Heat-Resistant: up to 280 note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.