Trap unwanted fuel vapors coming from your competition fuel cell vent line. 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 car is stored in an enclosed garage or trailer. Canister features large 16AN ORB female ports. Also included are adapters for connecting to 12AN (3/4") rubber vent hose. Can be installed/used in any orientation. Always terminate fuel vent line OUTSIDE the vehicle!