MC-TECH 's MLF series low pass filters are available from 0.1-110Ghz in seven waveguide bands. The filters have well matched, full waveguide pass band and thereafter a very wide stop band. The filters reject up to three times the highest pass band frequency. Due the natural waveguide cut off, these filters can also function as full waveguide band-pass filters. Consult Cernex for dimensions due to the wide range of waveguide sizes and frequency ranges.