These Coaxial Attenuators operate over the dc-40 GHz and are capable of handling up to 2 W for Model 54A and 20 W average for Model 89 and up to 200 W peak. Model 54A is available in 3, 6, 10, 20, 30 dB while Model 89 is available in 10, 20 and 30 dB.