Vinex VMBRK-J100 Medicine Ball Stand Properties: Single-sided medicine ball stand. Made of steel and powder coated for durability. Holds 4 medicine balls from 1 kg to 10 kg. It is carefully packed in a box and easy to assemble.;Vinex VMBRK-S100 Medicine Ball Stand Properties: Double-sided medicine ball stand. Made of steel and powder coated for durability. Holds 8 medicine balls from 1 kg to 10 kg. It is carefully packed in a box and easy to assemble.