The BAL-0003 from Marki Microwave is a Balun with Frequency 0.2 MHz to 3 GHz, Amplitude Balance ±0.05 dB, Phase Balance 1 Degree, Insertion Loss 1 dB, Power 1 W. Tags: Module with Connectors, Unbalanced to Balanced. More details for BAL-0003 can be seen below.