Dr. Hana's Nasopure Family Set # 2 contains 4 Refill Kits, 160 buffered salt packets & instructions. Each packet weighs 3.75 gm, and contains pharmaceutical grade sodium chloride & sodium bicarbonate. Each packet makes 4 oz of buffered hypertonic solution or 8 oz of isotonic (milder) solution. This kit makes a total of 640 oz of hypertonic solution or 1,280 oz of milder solution. NO OTHER ADDITIVES, PERFUMES OR INGREDIENTS.