These are boatboxes that came out of my Dad's jetsled. Had swivel seats mounted on the top. He wants to sell them, I'm just acting as his agent. LOL. But, they are 18" wide by 15" long and 14" high. They don't lock, but you could put a lock on them. They look like homemade wooden boxes with fitted lids. So seem to be waterproof once lids are on and seats attached. He wants $40 for the pair. But, can make an offer, since I'm acting as his agent. LOL.