6340 Polyethylene Replacement Bladder, 66" Length x 65-1/2" Width, For Decon Decks by UltraTech $ 63.65 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart UltraTech Replacement bladder (includes bulkhead fitting). Made of polyethylene material. Rugged, double-layer polyethylene bladder provides 66 gallons of additional containment.