(5 Pack)#14130 Marineland O-Ring Cover Seal for Magnum 200, 220, 330 and 350 Canister Filters Go to amazon.com Related posts 10 best canister filter magnum 350 for 2022 Feature( 5 Pack ) #14130 Marineland O-Ring Cover SealFits Magnum 200, 220, 330 and 350 Canister FiltersQuality O'rings sold by TORK DistributorsSave Money, Buy in Bulk..