The SPI-Dry Basic Plexiglas Desiccator Cabinets are available in either amber or clear, 1/4" (6.5 mm) thick Plexiglas. The two sides and the top are shaped from a single sheet of the plastic material to improve the air-tight hold. All the other seams are solvent-welded. All cabinets feature easy-to-open doors that seal very tight. Also, all cabinets are available with either non-perforated Plexiglas or perforated stainless steel shelves. All cabinets are designed to be stackable.