... ,Corrosion resistance 3,Good quality,Reasonable price 4,Delivery timely 5,3 O-ring Specification :File folder BrandZLMaterialIronColourPlating,customer's colourSize280* ... first class product, competitive price and satisfactory service .1,High quality,reasonable price, sample is free2,Surface treatment: Chromium/Bronze/ ... have more than 10 years experience of OEM processing High intensity file folder