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1: The hotend's heater block and nozzle are primarily made of special high-temperature copper alloys with a softening point well above 500°C, offering advantages such as faster heating, high temperature resistance, high thermal conductivity, temperature distribution is more uniform, non-stick surface, reduces the adhesion of filament, and nickel-based plating that is resistant to wear. Statement: This hotend kit requires user assembly, please understand before ordering. 2: It is perfect for high temperature applications,while working perfectly with all 1.75mm filaments,including PLA, PLA Plus (PLA+), ABS, ASA, TPU, TPE, PP, PC, PA Nylon, PETG, PEEK, PVA, PLA-CF, PA-CF, PA6-CF, PET-CF, Wood filled, Carbon fiber filled, Glass fiber filled, Metal filled, Marble filled, Boron carbide, Tungsten or Glow in the dark filament. 3: The bi-metal heatbreak features a titanium alloy at the front end, which effectively reduces upward heat conduction from the heating zone. The rear end is made of a copper alloy, enabling rapid heat transfer and efficient cooling. The titanium alloy screws further enhances thermal insulation while maintaining secure, stable fastening during extended print sessions, so you don’t have to worry about the print head falling off during printing. 4: The NTC100K B3950 thermistor has a head size of 3 × 5.5mm, an XH1.25 connector, and a total length of about 52mm. It is made of high-quality materials, ensuring superior stability, durability, and more accurate temperature measurement. (Maximum measurable temperature: 300°C.) Please note: The thermistor used in Ender 3 S1 series hotends comes with two different connector types. To ensure compatibility, please check your connector type before placing an order. 5: Heater Cartridge Upgrade: 40W to 60W, This upgrade delivers faster heating and shorter preheat times. It provides sustained, powerful heat output, which prevents temperature drops when printing high-temperature materials (like ABS, PC, or Nylon) or using large nozzles (0.6/0.8mm) at high flow rates. Statement: This hotend kit requires user assembly, please understand before ordering. Once you’ve installed the new hotend, please run a PID tune before printing.