PROTEK™ Doors made of 16-gauge; wall and center sections made of 14-gauge steel. Integral top with two 6 inch fans powered by 120 VAC via cord with standard NEMA plug, provide 230 CFM of airflow. Window made of 0.25 inch safety glass. Rack angles with 10-32 tapped holes per EIA universal standards are made of 12-gauge plated steel. Incoming air filter made of expanded aluminium. M6 door and body ground studs are masked from paint. Twenty 10-32 rack angle equipment mounting screws included with cabinet. Foam-in-place gasket made of durable polyurethane. Inline thermostat turns fans on when temperature exceeds 30°C.