The LG 5231JA2002A Refrigerator Water Filter is a 1-stage carbon/charcoal filtration unit suitable for household use. It is compatible with the Aqua Optima brand and the GEN11042FR-08 model. The filter is made of plastic and has a capacity of 1 L. It removes chlorine taste and odor from water. The unit is 16 inches deep, 11 inches wide, and 11 inches high, and weighs 1.5 pounds. It comes with a 3-month manufacturer warranty and is sold as a single unit.