This Silicone Sock cover case is the perfect accessory for the silicone sleeve of the 3D Printer heating aluminium block. It will help protect the 3D Printer hotend parts and also avoid your hand touching on the high temperature hotend area. It keeps stable temperature on the hotend to provid stable print for the 3D printing. It's easy to install and remove. The sock is available in different colour. If the head is equipped with a model cooling fan to cool the pressure, it can effectively heat up quickly and the temperature is not affected by the surrounding wind, which improves the quality. This silicone sock cover case is good for printing PLA filament, PLA+ filament, ABS filament, TPU filament and other materials.