The 2500BL14M050 from Johanson Technology is a Balun with Frequency 2.3 to 2.7 GHz, Amplitude Balance 1.5 dB, Phase Balance 15 Degree, Insertion Loss 1.2 dB, Power 3 W. Tags: Ceramic, Surface Mount, Unbalanced to Balanced. More details for 2500BL14M050 can be seen below.