The QOT-12 from QuinStar Technology Inc is a Orthomode Transducer with Frequency 60 to 90 GHz, Insertion Loss 0.8 dB, Isolation 28 dB, Return Loss 13.98 dB, Antenna Waveguide Dimension 0.125 Inches (Diameter). More details for QOT-12 can be seen below.