Marineland Canister Filter C-160 & C-220 Polishing Filter Pads, Rite-Size S BULK TWELVE PACK BULK PACKAGING: For this version we remove the Pads from the bulky packaging and pass on the shipping savings with a lower product price Replacement Polishing Filter Pads for Marineland C-Series C-160 & C-220 Canister Filters Replace every three weeks. Do not clean with soaps or abrasives. Screens out fine particulate dirt and debris Each of the SIX PACKS contain two pads (12 pads total)