This bundle comes with 6 weighted plyo balls, A Resistance band with foam padded wrist bands, and a clip designed to attach to a chain-linked fence and a carrying bag. These plyo balls are excellent tools for both hitting and pitching training. Each set comes with 6 balls that are 2000, 1000, 450, 225, 150, and 100 grams in weight and a handy pump to fill the balls with air when needed. This set is excellent for pitching velocity training. Excellent for pre-game and post-game warm-ups for all baseball players. We use top-quality and durable materials that allow us to develop products used by athletes all over the world. If for some reason you’re not entirely satisfied, please reach out to us. We are an AMERICAN company and offer a 100% MONEY BACK GUARANTEE