King Technologies (New Water) Mod: 400,600 (FEED006) VITON O-ring Replacement KIT This Generic VITON Lid o-ring in this Kit offers perfect fit, high quality generic products over OEM without high prices therewith. Why VITON? Chemical feeders introduce the harshest chemical your pool needs. At it's strongest state (in the feeder) it is hard on o-rings! VITON o-rings were made to LAST longer