Where can I find Insect screen in Römerberg?

Insect screen can also be found in these cities:

Bruchsal Eppelheim Hambrücken Heidelberg Hockenheim Leimen Ludwigshafen am Rhein Mannheim Nußloch Reilingen Sandhausen Schifferstadt Speyer Waghäusel Wiesloch

You can also find this in Römerberg:

Interior Doors Windows Awnings Acrylic Varnish Exterior Stairs Belt Grinder Concrete Formwork Blocks Fuels Hallway Furniture