The QMC-CRYOCHOKE-0.218SMA from Quantum Microwave is a Bias Tee with Frequency 0.2 to 18 GHz, Max. Voltage 35 V, Max Current 250 mA, Insertion Loss 0.25 to 0.75 dB, Return Loss -20 to -15 dB. Tags: Module with Connector, Cryogenic. More details for QMC-CRYOCHOKE-0.218SMA can be seen below.