Quantic PMI model number LM-0118-10-1W-SHS-2-FM is a high-power limiter that operates from 100 MHz to 18 GHz that handles 100 W peak power with a pulse width of 1 µs.  This limiter has an insertion loss of 2 dB, a VSWR of 2.0:1, and an input power of 5 W CW.  Contains SMA female and male connectors, and the size is 1.00" x 1.00" x 0.40".