Boat owners, RVers, and anyone needing portable water storage, these flexible tanks are brilliantly practical! The 100-liter (26.5 gallon) capacity in a 29x39 inch rectangular design fits perfectly in boat compartments, RV storage areas, truck beds, or emergency preparedness kits. Made from non-toxic PVC that's both waterproof and highly resistant to tearing and abrasion, these tanks are built to last through rough use. The form-fitting design means they conform to available space rather than requiring specific rigid tank compartments. Each tank comes ready to install with two welded fittings - a 38mm inlet and 12mm outlet valve with movable thread tightening rings for secure connections. The metal hanging hooks provide stability and prevent shifting during transport. Seriously, if you need extra water capacity but don't have space for rigid tanks, these collapsible solutions are perfect. When empty, they fold down compactly for storage, then expand to full capacity when filled. The grey color resists staining and looks clean in any application. Perfect for marine use where space is limited, emergency water storage at home, camping trips, construction sites, or any situation where you need reliable water transport. The quality construction means no leaks or failures, and the material is approved for potable water storage. It's one of those products that solves the universal problem of 'I need to store water but don't have the perfect shaped space' - because these tanks create their own perfect shape wherever you put them. Much more affordable than rigid tanks too, while providing the same reliable water storage functionality.