Aluminium frame with panels made of acrylic glass (PMMA), base panel made of polyethylene. With gloves made of natural rubber. Integrated HEPA filtering unit in the top side for a high-purity atmosphere in the workspace. Manometer to display the degree of filter saturation. Pipe sockets made of PE are included in delivery for converting to the different operating modes: internal air circulation, fresh air supply and exhaust. Exchangeable filter cartridge. Maintenance-free and trouble-free motor.