Summary Fan duct with more concentrated flow than original round duct. Appropriately lengthened for the E3D Volcano. This is just a model of the fan duct, nothing more. STEP and IGES files are included. I have not printed this yet. Print Settings Rafts: Doesn't Matter Supports: Yes Resolution: .25 Infill: 100% Notes: Your slicer must supply supports. Likely only printable from bottom to top. Because of proximity to the heat zone PLA is not recommended.