Quantic PMI Model SBA-500M18G-31D5-6B-SFF is a switched bit attenuator operating from 0.5 to 18 GHz designed to be switched between a low insertion loss state and 31.5 dB in 0.5 dB steps. The settings are selected by 6 independent bit controls. Specifications include insertion loss of 6.0 dB maximum; VSWR 2.0:1; 100 ns switching speed and maximum RF input power of 20 dBm.  Model has SMA female connectors and housing size is 1.15" x 0.85" x 0.50".  https://www.quanticpmi.com/product-details/sba-500m18g-31d5-6b-sff