Quantic PMI Model ISO-618-10-SFF is a 6 to 18 GHz coaxial isolator with an insertion loss of 1.5 dB maximum; isolation of 10 dB; forward power of 60 W / reverse power of 10 W and a VSWR of 1.9:1. Housing size is 0.85" x 0.63" x 0.55" with SMA female connectors. https://www.quanticpmi.com/product-details/iso-618-10-sff
