The SCBA Mobile Storage Racks LC12-4-30M, LC12-4-45M and LC12-4-60M are designed for easy storing and transportation of 30 min., 45 min. or 60 min. SCBA bottles. These products are manufactured of heavy gauge, square tubing, round bar, large 5” casters with locks and full length bottle valve protectors for increased safety which can also be used as push handles. The angled shelves, equipped with bumper guards, are dirt and dust collection free and allow free air flow for drying.