The MBAL-1440CH from Marki Microwave is a Balun with Frequency 14 to 40 GHz, Amplitude Balance ±0.2 to 0.8 dB, Phase Balance ±1.1 to 8.5 Degree, Phase_Shift 180 Degree, Common Mode Rejection 19 to 35 dB. Tags: Die, Balanced to Unbalanced. More details for MBAL-1440CH can be seen below.