Nautical Copper Diving Helmet 8.5" Tall. This DIVER'S HELMET is unique decorative replica of original diving helmet. This helmet is 8 1/2" tall and 8 1/2" across at the base and it weigh approx. 3 pounds. Diver's helmet is made of copper and brass metal and has 4 glass ports. This is an amazing item to enhance your Nautical collection decor.