The NCS4-63+ from Mini Circuits is a Balun with Frequency 4.5 to 6 GHz, Amplitude Balance ± 0.02 to 0.32 dB, Phase Balance 0.35 to 8.50 Degree, Insertion Loss 0.17 dB, Power 3 W. Tags: Ceramic, Unbalanced to Balanced. More details for NCS4-63+ can be seen below.