They are easily altered to a wide variety of applications. They are easy to clean and do not harbor bacteria like a lot of other materials. Very impact resistant, of course! The Translucent White lets in lots of light yet makes an excellent cover. All edges are heavily rounded. Discs are available in sizes from 10” diameter to 52” diameter, (2) wall thicknesses, and (33) Colors including the very popular Sandstone. Materials of construction: Food-grade Polyethylene with full UV protection.