exact items shown, you are buying one at a time, GRC 874 to type N adapter, used on RF meters and scopes from many manufacturers. Though we rarely see the 874 on new equipment, it's an excellent connector with good impedance matching across its intended operating frequencies. The QNJ is longer on the type N side than the QNJA.   Since ebay doesn't allow variations in this category, this listing is for the Short adapter, I will list the long one right after this listing. they are the same price and if you get both at the same time (and ask me so I don't forget), I will refund excess shipping.