10pcs silicone heat block cover & 2pcs 3D Printer Filament Holder1. Better temperature resistance and longer service life, supporting various materials such as PLA, ABS, TPU, HIPS, PETG, etc.2. Can effectively protect the heating block and the clean around the nozzle3. Made of heat-resistant silicone, it will not bond with printing materials of other ingredients, easy to clean up4. It has the function of heat insulation and scald prevention. The silicone sleeve has good thermal insulation properties and can effectively maintain the stability of the temperature of the heating block.Applicable to domestic Ender-3s / CR-10 / S and other 3D printersUniversal 3D Printer Filament Spool Holder, Suitable for Reprap 3D Printer PLA / ABS Filament Spool HolderGood load-bearing performance, durable and smooth sliding, easy to useSpecification:Product name: 3D printer nozzle silicone sleeveProduct name: 3D printing supplies rackColour: BlackMaterial: ABS & Soft gluePackage Contents:10 x silicone heat block cover2 x 3D Printer Filament HolderOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.