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. Specification: Item Type: Heater Block Kit Heating Rod: 24V 40W Throat Material: Ti Alloy (TC4) Material: Aluminum Alloy, Alloy, Silicone, Nickel Plated Copper Features: High Temperature Printing Below 300 ℃, Alloy Material Upward can Reduce Heat Conduction. Nozzle Diameter: Approx. 0.4mm/0.02in Applicable Model: for Ender 3 S1 for Ender 3 S1 Pro for CR 10 Smart Pro for Sermoon V1 for Sermoon V1 pro Printers. Package List: 1 x Heating Rod1 x Thermal Wire1 x Heating Block1 x Throat Tube1 x Nozzle1 x Black Silicone Cover2 x Screw