The FMBL1005 from Fairview Microwave is a Balun with Frequency 500 MHz to 2 GHz, Amplitude Balance ±0.4 dB, Phase Balance ±7 Degree, Phase_Shift 180 Degree (Difference), Insertion Loss 0.45 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for FMBL1005 can be seen below.