The TCM1-43X+ from Mini Circuits is a Balun with Frequency 10 MHz to 4 GHz, Amplitude Balance ± 0.03 to 0.97 dB, Phase Balance 0.42 to 6.88 Degree, Insertion Loss 1.01 to 1.67 dB, Current 30 mA. Tags: Surface Mount, Balanced to Balanced. More details for TCM1-43X+ can be seen below.