The Sub-Zero 4204490 Refrigerator Water Filter is a white, electric-powered water filter designed for built-in installation in larder fridge models by Sub-Zero. With a capacity of 750 gallons, this filter is lightweight at 1.41 lbs and is suitable for Sub-Zero brand refrigerators. It is an essential part for maintaining the clean and fresh water in your refrigerator, ensuring a reliable and efficient filtration system for your convenience.