The HA18A5W-20 from HASCO is a 50 ohm coaxial attenuator which operates from DC to 18 GHz. It provides 20 dB of attenuation(1 to 6, 7 to 12, 15, 30 and 40 options are also available). It can handle up to 5 W of average power and 500 W of peak power. The attenuator has SMA - male and SMA - female connectors.