The Metal : Made from Solid Brass. Nice Item, Great Deep Sea Diving Helmet Key chain.Helmet is 1.5 approx. Small size fits comfortably in your pocket. (this is a reproduction item). The item "Lot of 50 pc Vintage Brass Divers Helmet Keychain Nautical Diving Keyring Gift" is in sale since Tuesday, April 30, 2019. This item is in the category "Antiques\Marine/Maritime". The seller is "thevintage-treasures" and is located in HARIDWAR. This item can be shipped worldwide.