Feature 1 Scope of Application: This heater block set is compatible with for Ender 3 S1, for Ender 3 S1 PRO, for CR10 Smart Pro, for Sermoon V1, for Sermoon V1 pro 3D printers. 2 Bi Metal Thermal Insulation: TC4 alloy and copper are used for processing. Alloy has premium thermal insulation, and copper helps to dissipate heat. Long time printing can improve the printing quality. 3 0.4mm Nozzle: The outer surface of the inner hole is smoothly, and the material extrusion is smoother and more stable. It can be applied to various materials. 4 Silicone Case: Made of silicone, the case possesses softness and heat insulation, it can effectively defend your equipment. 5 300 Operating Temperature: The working temperature of this heater block set is up to 300, which greatly increase the working efficiency.Item Type: Heater Block KitHeating Rod: 24V 40WThroat Material: Ti Alloy (TC4)Material: Aluminum Alloy, Alloy, Silicone, Nickel Plated CopperFeatures: High Temperature Printing Below 300 , Alloy Material Upward can Reduce Heat Conduction.Nozzle Diameter: Approx. 0.4mm/0.02inApplicable Model: for Ender 3 S1 for Ender 3 S1 Pro for CR 10 Smart Pro for Sermoon V1 for Sermoon V1 pro Printers Package List1 x Heating Rod1 x Thermal Wire1 x Heating Block1 x Throat Tube1 x Nozzle1 x Black Silicone Cover2 x Screw