... price 2 big and 2 small castors stainless steel oxygen cylinder cart Hebei Baiqiang Medical Equipment CO.,LTD is the producing ... China. 2 big and 2 small castors, can carry oxygen cylinder easily and freelyany size can be availablehigh quality and low ... produce many different kind medical equipment such as medical bed, trolley, shelf, table, desks, locker, cabinet , etc,