These laminar flowhoods are wall mounted down-firing plexiglass cased which  gives a True laminar flow with a working window. Each one is hand built and custom painted by yours truly. They are 12x12x10 filters. They come with the stainless steal wall mounting brackets and colored plexiglass.  Since each 1 is custom after payment is recieved it takes 2 to 3 weeks to build it, paint it and ship it.