The V0028 from Custom Microwave Components is a RF Variable Attenuator with Frequency 5 to 18 GHz, Attenuation Range 30 dB, Insertion Loss 2.3 dB, Operating Temperature -55 to 85 Degree C, Storage Temperature -65 to 125 Degree C. Tags: Module with Connectors, Drop In, Continuously Variable. More details for V0028 can be seen below.