This is a fan duct for dual extrusion on Ultimaker.Designed in three separate parts Nozzle, Body & Cap.Print a copy of each one and glue it together.Printed in 0.1 Layer Height & 1.2 Shell Thickness, 40% infillUse 4x M3_20mm screws to fix it to the fan and extruder .Works fine even with small prints :)