Version Description: This SKU is a high flow version. Due to the extended melting zone, it is suitable for printing speeds of 200-600mm/s. If the speed is lower than 200mm, the pullback effect will deteriorate and the wire drawing phenomenon will worsen. So for speeds below 200mm/s, it is recommended to purchase the standard flow version. 【High-speed Printing up to 600mm/s】:K1 same hotend,the length of the melting section has increased by 50% compared to the original hot end of the Sprite Pro Extruder, reaching 28.5mm, with a maximum flow rate of 32mm ³/s, supporting a printing speed of 600mm/s. 【High Temperature Resistance up to 300°C】: The copper-aluminum bimetallic heatbreak make printing temperature up to 300℃，the temperature measurement of the thermistor reaches 300℃.Making it compatible with a wide range of filaments including PLA, ABS, PETG, TPU, PP, PC, nylon, and more. 【Integrated All metal CNC frame】1. All-metal design integrated radiator greatly increases the heat conduction volume and heat dissipation area, while reducing the overall weight and volume 2.The all metal frame brings unparalleled texture and appearance. 【Three fan design】One heatbreak cooling fan and 2pcs model cooling fans（4010 10000 RPM Double Ball Fan） can bring violent cooling ability, suitable for high-speed printing and high-temperature material printing. 【65W Ceramic Heating Block 】:This kit uses the same 65W 360 ° C ceramic heating ring and heating block as K1, which can improve heating efficiency, uniform heating, and rapid heat transfer, and can reach 200 ° C in just 30 seconds. 【Easy maintenance】:Using universal hot end accessories as K1, it is convenient to replace accessories, reducing usage and maintenance costs. Feel free to contact us (the seller) directly through the "ask a question" feature. The ChowThink Armour 3.5 Hotend is a must-have accessory for Ender 3 Series 3D printers speed-printing upgrade . Comprehensive upgrade your 3D printing experience with this powerful K1 same Ceramic Heating Block Hotend set for Ender 3 series. Designed as a k1 same nozzle solution, it features a copper aluminum bimetallic separation heat sink that delivers superior heat dissipation and temperature control，high Temperature Resistance up to 300°C. With a 50% increase in the overall hot melt section, including a 28.5mm length large hot melt section and 32mm³/s high flow, this kit enables printing speeds of up to 600mm/s.The all-metal hotend design ensures better heat dissipation and prevents clogging, enabling you to work with a wider range of filament materials, including high-temperature filaments like PETG and ABS. The integrated cooling system keeps the heat sink and heat break at optimal temperatures, minimizing the risk of heat creep and ensuring consistent extrusion. With its easy installation process, this upgrade is a simple yet effective way to take your 3D printing experience to the next level. Whether you're a hobbyist or a professional, the ChowThink Armour 3.0 Hotend Upgrade will provide you with the reliability and versatility you need for your 3D printing projects.