Designed to meet OSHA and NFPA standards, cabinets are constructed of sturdy 18-gauge (1-mm) thick double-wall, welded steel with 1-1/2 (38-mm) of insulating air space for fire resistance. High-performance, self-latching doors close easily and securely for maximum protection under fire conditions. Fail-safe closing mechanism ensures three-point stainless steel bullet latching system works every time._. This item measures: 70 H x 45 W x 21 D (inches)