Quantic PMI Model No. LM-20M20G-18-20WP-5W-MAH-SMM is a Limiter with a frequency range of 20 MHz to 20.0 GHz with an insertion loss of 2.5 dB Max, a VSWR of 2.0:1, an input power of 5 W, a leakage power of <18 dBm For 20 W Peak Power, 100 us PW, 10% Duty Cycle, and a recovery time of 9.38 ns. Unit has SMA male connectors and the size is 0.50" x 0.50" x 0.88".   https://www.pmi-rf.com/product-details/lm-20m20g-18-20wp-5w-mah-smm