Compatible Models: This hotend heat block kit is compatible for Neptune 4 and Neptune 4 Pro 3D printers. Package: This kit contains heating block, heating tube, thermistor, throat, 5 pcs nozzles and 5 pcs silicone socks. All Metal: The kit uses high-quality alloy throat, which can withstand high temperatures of 300 degrees Celsius, is durable, and provides stable printing quality. 5PCS Silicone Socks and 5PCS 0.4mm Nozzle: This heater block kit comes with 5PCS extra silicone socks and 5PCS 0.4mm brass nozzle for daily replacement. Colour:Photo Color Material:Aluminum + Brass Package Contents: 5 x Silicone Socks 5 x Nozzles 1 x Hotend Heater Block Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.