Pentair Rainbow R172009Z 3" Lid O-ring. (Fits Rainbow Module Filter Cap, 300, 302, 300-19, 300-29, 300-29X, 320 and 322 Chemical Feeders)
WARNING: The following product(s) can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov