Pack of 4 The product is Johnsen's synthetic DOT 3 Brake Fluid in a 12 oz. package. It is designed for use in automotive brake systems that require DOT 3 fluid. The brake fluid is formulated with synthetic materials to provide reliable performance and protection against brake system corrosion. The compact package dimensions of 5.91x4.21x2.64 inches make it convenient for storage and transportation, and with a weight of 0.88 pounds, it is lightweight and easy to handle during application.