API FILSTAR Filtration Foam Aquarium Canister Filter Contains one (1) API FILSTAR XP FILTER GASKET KIT Aquarium Canister Filter Spare Part 1-Count Replacement gasket kit for API FILSTAR XP S, M, L, XL (or RENA FILSTAR xP1, xP2, xP3, and xP4) canister filters Includes one canister gasket, one impeller cover gasket and 2 O rings