Features APPLICABLE MODEL: This extrusion head is a two color metal extruder kit for CR 10 Series and for Creality Ender 3 3D printers. HIGH ACCURACY: The dual wire single printhead allows for the connection of two types of consumables, switching between the two inputs when printing and extruding through the hot end for more precise molding positioning. ALUMINUM ALLOY: This extrusion head is made of aluminum alloy material with high thermal conductivity, good hardness and long service life. FAST HEAT SINK: The skeleton design of the heatsink allows the cooling fan to directly discharge heat from the throat, reducing the heat dissipation burden on the body of the heatsink. EXCELLENT PERFORMANCE: This extrusion head is a specially designed mixing channel, with smooth feeding, no clogging, good winding effect and less pulling. Specification: Item Type: Assembled Extruder Head Material: Aluminum alloy Nozzle Diameter: Approx.0.4mm / 0.02in Applicable Consumables: 1.75mm Applicable Machine: For CR 10, for Ender 3 Package List: 1 x Assembled Extruder Head Package List 1 x Assembled Extruder Head