Fast Connectors 222 Series 2 , 3 & 5 Port Lever Cage Clamp Terminal Blocks The universal 222 Series is designed for solid, stranded and fine stranded conductors. These connectors make connecting and disconnecting radon fans easier. With a connecting range of 0.08 mm² – 2.5 mm² “s”/4 mm² “f-st”, using the 222 Series you can connect not only radon fans but also lighting fixtures, awnings, door and gate controls, intercoms, pumps, loudspeakers – even an electric stove – plus many other applications…without tools!