The MTX2-133+ from Mini Circuits is a Balun with Frequency 1.5 to 13 GHz, Amplitude Balance 0.2 to 1.3 dB, Phase Balance 1 to 10 Degree, Common Mode Rejection 23 to 37 dB, Insertion Loss 2.1 to 6.4 dB. Tags: Surface Mount, Balanced to Unbalanced. More details for MTX2-133+ can be seen below.