2 pieces of O-ring fits all Spring Oasis Big Fat Whole House Clear Housings.

Compatible with 10" & 20" Big Fat Clear Housings that take 7/32" x 5 3/4" O rings. See attached pictures or measure your current O ring to make sure this one works for your housing.

Note: This O ring does not fit our Big Blue 3/4” port housings and Big Blue 1” port housings. For those housings, use O rings of eBay item #321314742274

Check your housing to make sure it is the same size as ours before purchase.