1,Easily attachable and deattachable 2,Corrosion resistance 3,Good quality,Reasonable price 4,Delivery timely 5,4 O-ring Specification :File folder BrandZLMaterialIronColourPlating,customer's colourSize250-4-20/28mmUsageStationeryMOQ500PcsPackingPlastic bag inside,carton box outsidePaymentL/C T/T,30%depoist and the balance before shipmentShipmentDHL/FEDEX/UPS/ , sea/air transportationDelivery ...