Air tanks; Breathing apparatus for underwater swimming; Divers' masks; Diving goggles; Ear plugs for divers; Life preservers; Life saving rafts; Life vests; Oxygen regulators; Protection masks; Regulators for use in scuba diving; Respirators other than for artificial respiration; Safety bracelets with warning whistles attached; Scuba diving masks; Self-rescue apparatus, namely, oxygen breathing units; Snorkels; Swim goggles; Underwater breathing apparatus