You are purchasing one each Swagelok street tee with 1/4 npt, Part # is B-4-ST. Material is brass. Please look at our other listings for more valves and fittings. We will combine purchases to save the buyer on shipping. If purchasing multiple items and the shipping looks wrong it probably is. Ebay's shipping calculator has problems getting it right. We charge actual shipping and will refund any significant difference. If possible ,buy and ask for an invoice.