These folding wire mesh retention units are arguably one of the most cost-effective ways to convert standard and euro sized pallets into efficient, practical storage cage stillage containers. Frames are designed to be fully collapsible when not in use, folding flat and easy to store, therefore incredibly space saving for warehouses. They are ideal as a returnable packaging solution, minimising space whilst in transit and ultimately reducing transport costs. Several models are stackable; stacking 4 units high in some instances. Removable and hinged gates, enables easy access to the palletised goods. The steel wire mesh frames fit neatly onto pallets, held in position with retaining clips. Units can be fitted to wooden and a range of plastic pallets.