The SD212E-SF2P4SNM(D00B-ABK from Sinclair Technologies is a Base Station Antenna with Frequency 138 to 174 MHz, Frequency Band 1 138 to 174 MHz, Gain 7.6 dBi, Vertical Beamwidth 34 Degrees, Horizontal Beamwidth 185 Degrees. Tags: Dipole. More details for SD212E-SF2P4SNM(D00B-ABK can be seen below.