The EV307119 Everpure O-Ring is a genuine OE part is for use in Series K pre-filters, scale inhibiting feeders and Kleensteam Model AR-X’s. Measuring four inches, it helps reduce the risk of leakage in your filtration systems. Pair with silicone lubricant when used and replace with every two water filter changes for best results. Offered here at a price helping ensure you are able to stock up! Get the EV307119 Everpure O-Rings you need by ordering online from us today. Order by 4pm CST for same day shipping.