HYPERWEAR Heavy Duty Sandbag Workout Bag System Includes Filled or Empty SandBell Sand Kettlebells for Fitness, Strength Training, Conditioning - 25lb XS/40lb SM/80lb MD/160lb LG 40 lb (4, 6, 8, 10, 12 lb SandBells) SM 40 lbs Assortment 5 Sandbells - Blue