This is a soldering fume extractor designed for a 12v 120mm case fan & can be used with or without the flexible tube (pictured). It's designed to mount onto a lamp arm but could be mounted onto any base. The duct adapter reduces from 120mm to 85mm diameter sleeve to suit the flexible downpipe available from Bunnings in Australia for $9.90 AUD.Printing: Duct & Shroud: Infill 20% Layer Height 0.2mm Number of shells 2 Feedrate 90 mm/s Travel Feedrate 150 mm/s Print Temperature 230c This was printed with black 1.75mm PLA on mbot Rep2. Assembly: 1) Bolt the duct to the mount with a 3/16" countersunk bolt with a wingnut & rubber washer. 2) Bolt the Shroud & Duct to the Fan with 4x 3/16" countersunk bolts. 3) Cut off the standard rectangular connections of flexible downpipe hose with an x-acto knife to leave the tapered round end. 4) Slip the flexible hose into the 85mm diameter duct connection. Enjoy!