Perfect Compatibility: Designed specifically for Hayward CL200 and CL220 pool chlorinators, this 8-pack of CLX200K replacement O-rings ensures a seamless. Precise Specifications: Each O-ring in this set measures 5.2 inches in inside diameter, 5.5 inches in outside diameter, and 0.2 inches in thickness. Compatible model numbers include 308-1125, spx1500P, 47-0354-07-r, 004036, 303420, 53-159, 354533, 2921141215, o231, & 35505-7430. Effortless Installation: Replace your pool chlorinator's O-ring in under 5 minutes without any tools required. This straightforward process ensures that your pool maintenance is hassle-free, saving you time and effort. Color:Black Material:Rubber Package Contents: 8 * O-Ring replacement Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.