Feature: 1. APPLICABLE MODEL: The extruder heater block upgrade kit is suitable for Ender3 S1, for Ender3 S1 Pro, for CR10 Smart Pro, very versatile and useful 2. SIZE INFORMATION: The size of the heating rod is dia 6x72.5mm, 24V 40W, with terminal XH2.54, the total length of the terminal is about 73mm; Thermistor rod size is dia 3x51mm, upgraded version, long working time up to 300℃ 3. STRONG MATERIAL: The heating block is made of aluminum; The heat shielding is made of Ti alloy TC4 and has a very glossy wall that provides excellent insulation between the heater and the cooling block. Ti is a very strong material with a thermal conductivity almost three times that of stainless steel, allowing for a more defined melting zone 4. APPLICABLE FILAMENTS: The inner hole and outer appearance of the coppered nozzle are glossy, and the material outlet is more fluent and stable. Can be used in PLA, TPU, PETG, ABS and other types of filaments 5. EFFECTIVE HEAT INSULATION: The bimetallic heat insulation pipe is composed of TC4 Ti alloy and copper, and the innovative design effectively reduces the upward heat transfer(7 W/mK), while improving the heat dissipation effect(400 W/mK), achieving stable and excellent 3D printing Specification: Item Type: Extruder Heater Block Upgrade Kit Material: Aluminum, copper plating, Ti alloy, silicone Brass Nozzle Size: 0.4MM Heating Rod: 24V 40W High Temperature Resistant Thermistor Cable: 300℃ Heat Sink Size: Approx. 41 x 20 x 13mm / 1.61 x 0.79 x 0.51in Heating Rod Size: Approx. dia 6 x 72.5mm / 0.24 x 2.85in Heating Rod With Terminal Total Length: Approx. 73mm / 2.87in Thermistor Rod Size: Approx. dia 3 x 51mm / 0.12 x 2.01in Package List: 1 x 24V40W Heating Rod 1 x High Temperature Resistant Thermistor Wire 1 x Aluminum Heating Block 1 x Ti Alloy Copper Bimetal Heat Break 1 x Copper Plated Nozzle 1 x Black Silicone Sleeve 4 x M2x14mm Hex Screws 4 x Hex Top Screws 1 x Small Screw 1 x Aluminum Heat Sink