The Mark V Diving Helmet, a self-contained breathing apparatus developed for the US Navy, was the standard diving dress of its time for early deep sea underwater military exploration. Dive into the past with Mark V, who will go to great depths to help you succeed. Contains: one 2" - 3" string doll character with a double-sided fabric tag and lobster claw keyring. Fair Trade and Handmade in Thailand, each string doll has his or her own special power that is always positive and helpful. They are fun for the whole family and make a perfect gift.