One Pair is a NIB set of NC Star High Mount QD rings. They are both 30mm/1inch I believe due to the inserts. Includes all screws. The other two are of unknown brand but they are both of the low mount QD type. They DO NOT include the screws, rings only. These are 3 complete pairs (minus the screws on 2 sets). Asking 20 shipped for the whole lot. Paypal or Gunpal only, you pay fees.