The PDR5001 features an "open" design, meaning it does not have internal dividers. This makes it the ideal choice for bulky or irregularly shaped items that require the extra height but don't fit into standard compartment grids. Manufactured from high-impact, chemical-resistant polypropylene, this extender is built to withstand the punishing environment of a commercial washroom, including high-temperature sanitizing cycles and heavy daily use. Its precision-engineered interlocking tabs ensure a rigid, "no-slip" fit that maintains the structural integrity of your rack stack.