5020 50mm x 20mm blower with dual intakes

This is not the common 5015 blower. This is a 5020 blower (squirrel-cage radial fan) with dual intakes and a much bigger outlet that is significantly quieter than the 5015 blowers.

I've been using this in some custom designs and needed the model for FreeCAD.
I'm uploading the STL as I think it's required to publish a part, and including a STEP file which should work for any CAD package in case anyone else finds this useful.

I couldn't find a decent model of this on any site, so decided to