IWS Flood & Drain TankIWS FLEI TANK WITH PUMP The IWS Flexi tank can fit into spaces normal solid water butts can't. It can be assembled in moments and doesn't require tools to set up. Because of its composition, it can be stored in minimal spaces and qualifies for reduced shipping costs when compared to solid water butts. The Flexi Tank features sturdy support poles and reinforced stitching. AVAILABLE SIZES: 250L 400L 750L 1000L