Eyesaline Refill Cartridge For Flash FloodPreserved, buffered, pH balanced solution makes this replacement cartridge an excellent choice for workplace safety. Cartridge has a long shelf life; up to 24 months unopened and six months activated. Easy-to-install cartridge takes less than five minutes to put in place. Cartridge delivers three minutes of clean, fresh saline solution. Capacity (Volume): 1gal; Packing Type: Cartridge.