Feature: Goods (usually semi-finished products carton, components and cartons)are placed on rollers from one aisle and are withdrawn from the other aisle. Goods can slide down by itself on the rollers under gravity,every layer should load within 1000kg  to each unit rack and within 2.5 meters in height.
Application:it is often used in lines like manufacturing, commercial distribution center, assembly workshop and warehouse where goods are frequently moved.