Made from Powder coated GI, with 0.3 micron HEPA filter, Complete inner working area made of stainless steel, negative pressure pleanum all arround, support stand etc. Models available are: CLASS II A2: Size 3x2, 4x2, 6x2 feet CLASS II B2: Size 3x2, 4x2, 6x2 feet CLASS III with Glove port and integrated pass box