Selective Pallet Racking is the most widely used system for storing palletized goods. Each pallet is individually supported and independently accessible. A standard counter balance truck can be used in aisles 3.5 to 4 meters wide. Reach trucks can work in aisles only 2.5 meters wide. Pallet racking arranged in this way gives high quality storage but may only utilized 40% of the available floor space, the rest being aisles. However, fast throughput and ease of loading and unloading make this type of storage extremely popular. A wide range of accessories are available as options.