Flow racking is gravity-based and allows one to load material on one end and flow through the system to the other. Also called gravity flow or gravity feed racks, the systems can come in a various number of levels and lanes. The angled system allows products to operate on a First In, First Out basis, being pushed forward by gravity to the front of the rack when a box, pallet or bin is removed. It can sometimes have a braking system in place to control the speed of the movement of the product. From pallets to boxes to bins, flow racks work well with an assortment of product and material types and can roll across a flat surface or roller tracks. The system allows for greater storage and picking efficiency because they are high-density systems and can be picked and replaced quickly.