PMI Model No. EQL-26D5G40G-1D5DB-292MF is a 26.5 to 40.0 GHz, Passive Amplitude Equalizer with a negative slope.  Specification include Maximum Input Power of 0.5 W CW; VSWR of 2.0:1; Insertion Loss of 1.5 dB; Slope of 0.41 ± 0.06 dB/GHz; and Amplitude Accuracy of ±0.5 dB.   This model has 2.92mm male/ female connectors and housing: 1.10" x 0.67" x 0.22".