Sandbag Sand Filler Bag - Inner weight bags for Sandbag Training Workout equipment - Works with all supplier bags - Avai in Three Sizes - XL (45lb max), LG (30lb max), MED (15lb max) - Velcro Sealed Four Pack of Internal Sand Fillers - Two 30lb capacity and Two 15lb capacity Sand Tubes for Sandbag Training Made of Industrial Strength 1000D Nylon with double velcro seal Fits Outer Shells and Bags from Various Manufacturers Dimensions - Large - 27in Long x 9 inches wide -- Each Bag weighs up to 30lbs when full - Medium 22in Long x 7 inches wide -- Each Bag weighs up to 15lbs when full THESE BAGS DO NOT SHIP WITH SAND