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 (1/2 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 1/2 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: 15.6 x 36.2 x 33cm Internal: 8.9 x 30.5 x 18.8cm Master LockA21B2021