This is from the Vintage Scent Website: Semogue 2000 Shaving Brush €16.78 Ex VAT €20.64 Inc VAT Portuguese Beech wood handle White Premium 90% tops mixed with White Super 70% tops Knot: 25 mm, Loft: 60 mm. I am unaware of a 26mm Semogue knot.
This is a BIN, so I can link it. I have this brush and it is outstanding. https://www.ebay.com/itm/Antica-Barberia-Boar-Shaving-Brush-Shiny-Aluminium/302166732168?epid=2266889275&hash=item465a8a6d88:g:ZoAAAOSw9GhYeGZt