The Magma Propane/Butane Storage Bag is safe, convenient, and essential for boats without approved propane or butane gas storage lockers. Stows three disposable butane or propane canisters safely out over the water. Made of heavy-duty, process-dyed acrylic boat cover material, the bag resists water and fading and is highly breathable. Heavy nylon adjustable straps with snap connectors let you easily attach the bag to a horizontal rail or lifeline. Model#: A10-210PB.