The NCS4-272+ from Mini Circuits is a Balun with Frequency 2.3 to 2.7 GHz, Amplitude Balance ± 0.03 to 0.28 dB, Phase Balance 0.08 to 0.59 Degree, Insertion Loss 0.33 dB, Power 3 W. Tags: Ceramic, Unbalanced to Balanced. More details for NCS4-272+ can be seen below.