Replacement Lid/Cover/Head Seal O-Ring for SunSun HW303A (HW-303A) and HW303B (HW-303B) canister filters.
Approximate O-Ring Dimensions: 8.70” Inside Diameter (just under 8-3/4”), 9.12” Outside Diameter (about 9-1/8”), 0.215” Thick (between 3/16” and 1/4”).
Package includes two (2) o-rings (also called gaskets, seal rings, or rubber rings). Replace your old, worn, leaking o-ring and have a spare on hand for the future with this handy 2-pack.
Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA!
