The Master Lock LCFW30100 Large Key Locking Chest is waterproof and fire-resistant It has a sleek design with a flush-mounted faceplate and rugged look It conforms to various classifications UL Classified to fire endurance 1 hour at 927°C to ensure the protection of documents records and valuables in the event of a fire and to explosion hazard test Subjected to a flash fire in a 1093°C furnace for 20 minutes the unit will not explode or rupture ETL Verified for 1 hour fire protection of digital media up to 927°C in the event of a fire and for water submersion to protect valuable items and documents from flood damage Specification Dimensions HxWxD External 193 x 419 x 375cm Internal 136 x 321 x 232cm