SCUBA DIVING HELMET U. S NAVY MARK V SOLID STEEL ORIGINAL NICKLE Full Size 18 US Jan 26, 2019 scuba Premium quality well made deep sea diver helmet replica. Material :Brass Iron Steel AL. Weight : 8.5 kg. Volume Weight: 15 kg. Top head measurements: 16″ x 12.5″ x 17 / 40cm x 32cm x 42cm....