A mod for standard festool 27mm hose that ships with numerous festool extractors such as the CTL MIDI.
The outer hose diameter is 39mm and slightly larger than fein at 35mm (shown in the third image where the hose comfortably rests on top of the clips).
This mod is designed to attach to the hose boom sold and supplied by Rowdy Roman on Etsy (below) for use with the Onefinity CNC and other CNC machines.
Mod sacrifices the water tube arm so is probably not suitable for use with a spindle but works great to hold router power cord up and away from the workspace.
RR hose boom on Etsy: https://www.etsy.com/uk/listing/836980394/hose-boom-for-makita-router-65mm-users
Digital files available for purchase here: https://www.etsy.com/uk/listing/851354816/onefinity-cnc-vacuum-boom-digital-files
I'm not affiliated with Rowdy Roman in any way, just found the Fein hose clips provided nipped the festool hose.
Printed at 25% infill, Prusament PETG, wall thickness 4.
The author hasn't provided the model origin yet.