Farwind Aluminum Remote V6 Bowden Radiator Heatsink with 4.1mm Throat J-Head for 3D Printer Extruder Go to amazon.com Related posts The 10 best heatsink extruder 2022 FeatureMaterial: AluminumBore Diameter: 4.1mmScrew thread: M6 DescriptionMaterial: AluminumBore Diameter: 4.1mmScrew thread: M6Application: For 3D printer extruderPackage Included:1 x E3D V6 Heatsink