Includes Resin, Hardener, 12 small and 3 large reusable Measure & Mix Cups, 6 Mixing Wands. Enough to mix 24 standard-sized batches, or larger batches using blue cups. Each standard batch will make 3-6 castings, or about 15 square inches with the Doming Technique. 2-to-1 mix ratio. Shelf life is about 1 year, maximized by storing in a cool, dry place, away from light. Functional for many years, but for top clarity you should use before Part B starts to tint.