This is a modular tool rack. Depending on your specific requirements, you can choose from 4 different horizontal shelves:

4141 Balls Shelf (shelf for medicine balls) 4142 Angled Shelf (rubber-lined angled shelf for dumbbells) 4143 Flat Shelf (universal rubberised shelf; e.g. kettlebell holder) 4144 Bumpers Shelf (bumper record shelf)

Shelves must be supported by columns:

4140 Upright Column Kit. 4139 Mini Upright Column Kit

Two kits are required to compose the basic single-bay shelving unit, which can then be extended by adding other kits. The kits are sold individually so that 2, 3, 4 and 5-bay shelving units can be assembled as desired.