We are currently running 5-7 business days behind in shipping the 35 Series filters.
Round Gasket, 11.5" Outside Diameter (11" centerline), 1/2" x 1/2", fits 12.75" and 13" Filters
$14.00
Round Gasket for 12.75″ and 13″ Filters 11.5″ Outside Diameter (11″ centerline), 1/2″ x 1/2″ No adhesive