Water-absorbing canister fuel tank filter replacement canister Gasoline, diesel fuel, and biodiesel blends up to 20%For Goldrod canister fuel tank filter Water-Block models 596 and 596-3/4 only10 micron filtrationWater-Block filter removes water from gasoline and diesel fuelWater-absorbing polymers trap water restricting fuel flow when it is time to replace the canisterMade in U.S.A.