NuovaRade Flexible Water Tanks 29x39in - 100Lt - 29 x 39/26.5 Gallon, Grey Flexible, lightweight and form-fitting, the ideal solution when rigid water Tank is not an option due to shape of boat or difficulty in access Waterproof and high resistance material that protects them from tearing and abrasions The tanks are supplied with a valve, which can be used for ventilation and with two extra fittings (cut through Hole: 1.9 inch ). They are easy to store and Use Metal hooks for fixing and therefore for a better stability Made of non Toxic PVC