Trap unwanted fuel vapors coming from your fuel tank or fuel cell. This canister installs in-line with the vent hose and contains activated carbon that is effective at trapping fuel vapors, but does not impeded air flow. This will eliminate unwanted fuel smells that can be noticed when a vehicle is stored in an enclosed garage or trailer. Canister features two 10AN ORB female ports for vent hose in/out. Hose barb adapter fittings included for connection to 12AN (3/4") hose. Compact machined aluminum design fits into small spaces without losing functionality. Approximate size: 5.25 x 3.25 x 1.28 inches. Fully serviceable.