Quantic PMI Model LM-2G18G-RAD-3W-19DBM-SMF is a low leakage limiter operating over the 2 to 18 GHz frequency range. This model offers excellent temperature stability with exceptionally low loss of 2.5 dB; leakage power of 80 mW (+19 dBm) typical; VSWR of 2.0:1 maximum; and input power rating of 3 W average, 1,000 peak power.  Unit size is 0.188" x 1.314" and has 2.92mm Male IN/ Female OUT connectors that are 100% Compatible with other SMA connectors.   https://www.quanticpmi.com/product-details/lm-2g18g-rad-3w-19dbm-smf