"I bought these polystyrene boards to stabilize artificial window box flowers embedded in floral foam blocks. They were invisible within the window box but were just what I needed to finish off my project. The end result was beautiful and secure. _doneil"
12 pack, 1-Inch Thick Foam Rectangle for craft, Centerpieces, School Projects, Packaging, Polystyrene Boards for DIY Sculpture 12x3.5x1"