First Alert 0.39 cuft, fire & water chest, great protection for digital media& fits standard letter size documents, ul classified, can withstand an external temperature up to 1,550 degrees for 30 minutes & independently verified to protect digital media, such as memory sticks, cds, dvds & external hard drives, waterproof seal helps keep the contents of the safe dry even when fully submerged, secure lock with clamping style latch & key prevents the chest from being opened by thieves, perfect if you want protection from theft, fire & water, interior dimensions: 13.25"l x 8.5"w x 6"h.