ECM carries low, medium and high power attenuators in most connector series. We cover frequencies up to 50GHz. To save you money, we stock attenuators by frequency. Which means you only pay for the level of frequency you need. (In general terms, the lower the frequency, the lower the cost.) ECM is an authorized stocking distributor for: ANRITSU A global supplier of K (2.92 mm) and V (1.85 mm) attenuators. They offer a GOLD LINE and a SILVER LINE. XMA Corp XMA bought the complete attenuation line from MA/Com and are now producing the exact same designs that MA/Com sold for years. XMA continues to add to their offering.