Cold Water Loft Tanks, Insulation Jackets & Lids, Jackets Available In 40mm Thickness In Rectangular & Circular Styles . Rectangular we have a 4 gallon 12″ x 12″ x 18″ , 25 gallon 22″ x 22″ x 29″ and 50 gallon 24″ x 24″ x 48″ . Circular we have a 25 gallon & 50 gallon. Deliveries From The Central depot Usually Next Day