The TCW2-272+ from Mini Circuits is a Balun with Frequency 2.1 to 2.7 GHz, Amplitude Balance ± 0.01 to 0.40 dB, Phase Balance 0.35 to 10.88 Degree, Insertion Loss 1.13 to 1.34 dB, Power 2 W. Tags: Ceramic, Unbalanced to Balanced. More details for TCW2-272+ can be seen below.