1/2 ounce (15ml) emergency eye wash ampoules. Sterile, buffered, isotonic solution consisting of 98.57% USP purified water. Expires four years from date of production. Made in the USA. Produced in High quality audited factory in compliance with GMP standards and regulations. Made according to FDA monograph for Eyewash CFR 349.2. Each vial is 0.5 fluid ounces or 15 ml. Solution contains high-capacity buffering agents to achieve the pH within 6.6 to 7.4 range. Comes as a set of four vials. SDS sheet available. It is used for the cleansing of the eye to help relive irritation, discomfort, burning, stinging, smarting or itching by removing loose foreign material, air pollutants, (smog or pollen) or chlorinated water. Flush the affected eye as needed controlling the rate of flow of the solutions by gently squeezing. Employers can provide eyewash bottles in instances where plumbed or self-contained units can't reasonably be provided in the immediate work area, but only until they can reach a plumbed or self contained until to flush the eyes for at least 15 minutes. Discard after use.