For eliminating free radical damage to the body. Vitamin e and selenium support and protect each other for maximum efficacy. Blended with a quality yeast culture base. A balanced supplement that can enhance antioxidant activity. Enclosed scoop holds one ounce. Feed 1 ounce daily, or as directed by your veterinarian.Size is 4 Pound. Dimensions are 6.25 X 7.75 X 8.25 Selenium 0.035% (1 Milligram) Vitamin E 1000 International Units. UPC Code = 758900011038