Description   This item is manufactured with top-class heat-resistant ceramic fiber material for durable and practical use. It is used for 3D printer nozzle keeping warm. It is with super good heat insulation for better printing effect. You can design a suitable size to make a hole of the heating block cotton. Features     - Color: Yellow. - Material: Ceramic fiber. - Size: Approx. 6.8 x 1.8 x 0.3cm/ 2.7 x 0.7 x 0.12 inch (LxWxH). - Can work for a long time in a high temperature below 300 degrees. - Premium material with good elasticity, heat insulation and small shrinkage. Saving power and energy. - Resistance to thermal shock, low thermal conductivity and thermal capacity. - Perfect for keeping 3D printer nozzle warm and bringing better printing effect.Packing list: 10 x Heating Block Cotton for 3D Printer Hotend Nozzle Heat Insulation 3mm