The RFXF2513 from MiniRF is a Balun with Frequency 0.3 to 200 MHz, Amplitude Balance ± 0.1 to 0.5 dB, Phase Balance 1 to 5 Degree, Insertion Loss Less than 1 dB, Power 2 W. Tags: Surface Mount, Unbalanced to Balanced. More details for RFXF2513 can be seen below.