You are purchasing one each Swagelok brass female connector; B-600-7-6 with 3/8 tube by 3/8 female npt connections. Please look at our other listings for more Swagelok, Parker, Hy-lok and other fittings and valves. We will combine purchases to save the buyer on shipping. If buying multiple items and the shipping quoted by ebay looks incorrect it probably is.  We will refund any significant excess shipping charged.