The T4-6-KK81+ from Mini Circuits is a Balun with Frequency 0.02 to 200 MHz, Insertion Loss 0.28 to 1.99 dB, Current 30 mA, Power 0.25 W, Return Loss 2.65 to 25.21 dB. Tags: Surface Mount, Balanced to Balanced. More details for T4-6-KK81+ can be seen below.