Large End Shield High precision , and high quality mechanical component, used on high-speed train and transipotation Jiangsu Giant Ally Imp. & Exp. Co., Ltd.is a high-tech enterprise focusing on the designing and manufacturing of precision components: welded neck flange, coupling flange, plate flange, flat flange and so on. We have established a long term relationship with the world top 500 enterprises: Bombardier, Danieli, Siemens etc. Specification:Material: H13, 42CRMO, 35CRMO, 40CRNIMO, 304Standard :ISO90012000, ISO14000Range of diameter : 50MM-5000MMSurface accuracy: 0.001