Double Deep Pallet Racking uses the FILO (First in Last out) principle and in terms of understanding is nothing but Selective racking installed as a back-to-back rows for the single faced rack and four back-to-back rows for the double faced racks. This is done to minimize the aisle space wastage in the warehouse and as illustrated the storage capacity of the same warehouse is increased by 26%. The only added cost for a DDR is the addition of reach scissor forks to your forklift to enable is to reach the pallet at the rear. DDR is used when customers have generally more than one pallet of the same product at any given time. Due to the extensive configuratuons possible with this system prices are on application only.