trolley case 1)size:20"/24"/28",material:nylon, 2)internal trolley system, 3)OEM is available. trolley case1)Item No.:MFLB28292)Material:two-tone nylon, figured lining, front laminated with EVA.3)Aluminium internal trolley system, iron combination lock.4)Size:20"/24"/28"5)packing:packed with bubble polybag, then in standard export carton.6)loading quantity:20GP:184sets40GP:386sets40HQ:478sets