Features: Advanced hotend kit,experience enhanced 3D printing with this professional grade hotend kit. It features a thermistor and a heating rod for precise temperature control. Smooth and leakfree feeding with a 45° chamfer design on the throat thread, ensuring smooth feeding The crosssectional area of the nozzle is flat and smooth, highly compatiblewith supporting accessories Good hightemperature resistance and thermal conductivity is 6063 aluminum, resistant to hightemperatures of 300°C, with a surfacefinish of 0.5 Durable, corrosion-resistant, waterproof, rust proof, and highprecision. Brass material has good thermal conductivity, highhardness, and the roughness of the inner wall of the pipeline Raless than 0.4, reducing blockage, hightemperature resistance, fast thermal conductivity, and more stable printing Specifications: Material： Metal Thermistor: NTC3950 100K Heating rod: 24V50W Size：Mixed As Pictures Packages：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 Package Includes: 1Set Hotend Kit note: Please allow 0-1cm error due to manual measurement. pls 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!