Here is another punching bag that helps you work on your striking. The RDX Freestanding Punching Bag is a 6ft XXL freestanding bag with a 17-suction-cup base. It measures 35cm in diameter to give you lots of space for your kicks and punches.
The base can be filled with sand and water (up to 120kg). The bag has reinforced dual stitching and anti-tear nylon lining.