Floor model only. Hone your punching prowess and practice slipping, blocking, defense, jabs, and more with this all-around punching bag. The springing motion provides realistic opponent action, and suction cups on the base provide stability while preventing scuffing on floors. Manufactured with heavy-grade stainless steel tubing, the PVC plastic base can be filled with water or sand for ultimate stability. Suitable for smooth surfaces such as floor tiles, concrete, or laminate.