The RBL-5400-2012-W-TR from Raltron is a Balun with Frequency 4.9 to 5.9 GHz, Amplitude Balance ±2 dB, Phase Balance ±10 Degree, Phase_Shift 180 Degree, Insertion Loss 1.1 dB. Tags: Surface Mount, Balanced to Balanced. More details for RBL-5400-2012-W-TR can be seen below.