The 03.02.624 from Hytem is a Coaxial Fixed Attenuator that operates from DC to 18 GHz. It provides an attenuation of 30 dB and can handle a CW input power of up to 250 W. The attenuator has a VSWR of less than 1.55:1 and is impedance-matched to 50-ohms. It is available in a grooved cylindrical module that measures 318 x 92.5 x 60 mm (reference) and has N-type (male/female) connectors.