... steel. 3. OEM service is offered. 1.stainless steel impeller casting.2.available material:stainless steel,carbon steeland refractory steel ... :spectrometer.7. OEM service is offered.8.Products coverage: aircraft manufacturing,ship building,auto, asrtificial limbs, chemical, weapon, sanitary bath ... Products: valve, flange, screw nut,screw bolt, pipe fitting, impeller,coupling, pump parts and so on. ss304 ...