Check the listing for details. Microlab / FXR AX-A20 Variable Attenuator Set 5985-00-231-3687 - New Old Stock. Condition: New – Open box. Listed at 311.95 USD. Microlab / FXR AX-A20 Variable Attenuator Set 5985-00-231-3687 - New Old Stock Microlab / FXR AX-A20 Variable Attenuator Set 5985-00-231-3687 - New Old Stock New Old Stock Variable Attenuator SetMicrolab / FXR(1) AX-A07 Portion(1) AX-A06 PortionAX- A20NSN: 5985-00-231-3687*We do not know the exact specifications of this item, but I can give you an educated guess that it works from DC to the high MHz region, BNC connectors are good to 4 GHz. Max. this would fall below that range I'm guessing total attenuation is about 20 dB, strictly from the part number. Again just an educated guess, not gospel. The government paid $3800 for the unit, back in the day it's a high dollar piece. Please take a look at all of the provided photos before placing your bid to thoroughly inspect the lot contents and condition. Item Condition: New - Old Stock Return Policy: We are offering the buyer a 30 Day right of return for testing and inspection. Buyer will be responsible for the cost of return shipping. Listed for JP by HG - Located at: TN 38 D4, 85 (WS) Q. AX-A20 Shipping weight is 6.00lbs, 0.00oz, shipped from our warehouse in Tennessee. (zip 37370) Default Shipping Service: USPS Parcel Select Tennessee residents will be charged our local 9.75% sales tax. California residents will be charged our local 10.25% sales tax. (We have offices in both Tennessee and California and are required to charge tax to any shipment sent anywhere in either state.) B#: