GYMAX Punching Bag with Stand Adult, Freestanding Boxing Machine with Height Adjustable Speed Ball & Sandbag, Pre Filled Heavy Punching Bag for Adults2 in 1 Dual Boxing Method: This boxing bag stand comes with a filled heavy sand bag and a speed bag. You can train with the sand bag to practice both punching and kicking and exercise your whole body. Meanwhile, you can also aim at your upper body and strengthen muscles by hitting the speed bag. Adjustable Height: You can adjust the height of speed bag from 68" to 76", which is suitable for people of different height or various exercise requirement.