"EyS" Eye Wash in two 4-packs is Made in the USA! It is a Sterile Buffered Isotonic solution made from Purified Water USP 98.4% and is used for the cleansing of the eye to help relieve irritation by removing loose foreign material. Each vial is 0.5 fluid ounces or 15 millilters Flush the affected eye as needed controlling the rate of flow of the solutions by gently squeezing. Discard after use. Expiration is 36 months. Sterile buffered isotonic eye wash made according to FDA monograph for Eyewash. Comes as a double-set of 8 vials.