Laser cut. 1 mm thick cardboard.
Gratings 1mm X 1mm-Model Kits-Wooden,Plastic&Card Model Accessories-Laser Cut
Artesania Gratings 60mm (30U) for Wood Ship Model Boat Kits
Mantua Models Gratings Beech
Mantua Models Gratings Beech - 1.5mm Holes: 36x36mm
Mantua Models Gratings Beech - 2.5mm Holes: 52x52mm