Hello, 1. The inner diameter of the 40-foot flat cabinet is: 12.032M*2.352M*2.385M; the inner diameter of the 40-foot high cabinet is: 12.032M*2.352M*2.69M2, FOB fee Calculation: product cost + profit + freight (referring to the freight for transporting factory products to the FOB shipping port) + port fees (usually refers to port fees before crossing the ship rail, such as bill of lading fees, THC, etc.) / foreign exchange price = export price 3. If the customer keeps the price very low, they can only give in on the export tax rebate. Many manufacturers will subtract part of the tax rebate from the export price