• The storage racks own light duty,medium duty and heavy duty base on load capacity standard.The light duty suitable for 100 to 200 kilogram per layer,medium duty suitable for 200 to 500 kilogram per layer,heavy duty suitable for 500 to 4000kg per layer.So,you can choice base on your cargo weight and believe own one style correspond with you. Meantime,the storage racks size need sure.This dimensi...