The 631-40-1F18 from MECA is a Fixed Attenuator that operates from DC to 18 GHz. This 40 dB attenuator can handle an average input power of up to 20 W and a peak input power of 500 W. It is available in an aluminum alloy body that measures 2.33 (H) x 1.5 (Dia.) inches and has SMA male/female connectors.