Stant 41001 InStant Fill Gas Cap (Not for use in CA, OR, WA) Clean hands customers, no smelly gas cap to touch Eliminates need to twist off fuel cap, no discomfort for those with arthritis in fingers, hands and wrists Meets OBD II diagnostic specifications, no check engine light Features a convenient trap door mechanism Does not work with all gas hoses, not for use in CA, OR, WA