One to go and one to stow! These space saving part-timer filter cartridges perfect for the part-time RVer on short weekend trips throughout a season. Sold in pairs, with a unique space saving size. have one to go and one to stow. You?ll always have a spare on hand. Reduces unpleasant tastes and odors. including those of chlorine, sulfur and iron, as well as dirt, rust and sediment. About half the capacity of the ADC Full-Timer cartridge (88-8873), since less filtration is required during its single-season life expectancy. Filters have an unlimited shelf life. Recommended for use with superchlorination/dechlorination disinfecting procedure. 2 per pack.