Features: Advanced hotend kit, experience improved 3D printing with this professional hotend kit. It features a thermistor and a heating rod for precise temperature control. Smooth and leak-free feeding with a 45° chamfer design on the throat thread, ensuring smooth feeding. The nozzle's cross-sectional area is flat and smooth, highly compatible with supporting accessories. Good high-temperature resistance and thermal conductivity are 6063 aluminum, resistant to high temperatures of 300°C, with a surface finish of 0.5. Durable, corrosion-resistant, waterproof, rust-proof, and high precision. Brass material has good thermal conductivity, high hardness, and the inner wall roughness Ra of the pipeline is less than 0.4, which reduces blockage, high-temperature resistance, fast thermal conductivity, and more stable printing. Specifications: Material: Metal Thermistor: NTC3950 100K Heating rod: 24V50W size: Mixed as pictures Package: 1Set For Neptune 4/4Pro Types: A/B/C/D A: Spray nozzle kit [Standard version] B: Spray nozzle kit + One 0.4mm brass nozzle included [Package 1] C: Spray nozzle kit + One 0.4mm bimetallic nozzle included [Package 2] D: Spray nozzle kit without heat dissipation block Note: Please allow 0-1cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1Set Hotend Kit