Are you looking for a professional, yet heating block silicone case? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? , ! Our professional heating block silicone case must meet you needs. It is one of the for you. Features - ColorAssorted Color - Material: Silicone. - Size: 2.10 x 1.20 x 1.20cm/ 0.83 x 0.47 x 0.47 inch. - Professional for 3D printer extruder, heated aluminum block silicone protective sleeve. - Adopts precision production to the stable characteristics and high reliability. - This hotend sock will greatly help to stabilize the temperature of the hotend regardless of the surrounding environment temperatures. - Hotend socks can be used to quickly heat the hotend to a desired temperature as the structure of the silicone inside the sock prevents heat from escaping quickly. - 3D printer nozzles are made of brass, not easy to get rust or erosion, sturdy construction makes them to serve you for long time. Package list: 1 set x extruder nozzles