The Master Lock H0100 Small 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 12 hour at 843°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 12 hour fire protection of digital media up to 843°C in the event of a fire and for water submersion to protect valuable items and documents from flood damage Specification Dimensions HxWxD External 156 x 362 x 33cm Internal 89 x 305 x 188cm