ONE very high end BNC to BNC connector. (use qty to select how many you need, shipping will combine) These are SILVER PLATED old stock VERY HARD TO FIND SINCE THE NEW ONES MADE ARE NO LONGER SILVER (and these are made back when they plated thick!) Bendix or Amphenol Were often used in aviation and other critical important equipment. These are great for SDI and digital video, due to the low loss characteristics and precious metal plating. Nut, outer ring, and star washer etc around 5/8" so barrell fits into a 1/2" hole nicely. See our other listing for Larger UG492-D/U size and comparable Amphenol, Kings etc You can take off the nut and simply use as a high end barrel for your cable extending needs as well. These look to be new old stock as there are no wear marks on the bnc collar, however they may have been installed and removed from a panel or something since they are not in orig packaging . We got them in bulk old box so not sure of prior history. May have some signs of bulk storage etc. Some are darker than others but as I am sure you are aware silver does that and does not affect its ability to conduct.