This Sheffield A5 Fire Safe has been tested from the Underwriters Laboratories (UL) in America in fire resistance & explosions safety! Brilliant isolation guarantees highest fire safety by less weight. Fire Resistance Test: 30min test in temperatures up to 176C, inner temperature stays under 176C (the critical peril point for paper). No danger of explosion at flame temperatures up to 176C. Cylinder lock with 2 keys. Lacquered silver finish. External Dimensions: 160 x 370 x 330mm (H x W x D). Internal Dimensions: 80 x 300 x 215mm (H x W x D).