5 ½" radiator is similar to the longer MFJ-1715 except for gain on 440 MHz. ¼ wave on 440 and efficient loaded ¼ wave on 2 Meters.
Both antennas are factory tuned for lowest SWR. Have Hi-Q, low loss construction to give maximum radiated power. Great for portable, mobile and rugged hamfest use. BNC connector.
For SMA connector, order MFJ-1713S.