This product is mainly used in large and medium oil, pharmaceuticals, fertilizers and air separation equipment industry. the technology is the leading domestic level. We produce 2-inch to 36-inch ball, good quality of our products, seal good, difficult to damage.The main material for carbon steel,chrom-nickel steel,chromiun nickel molybdenum stainless steel,titanium,chromium molybdenum steel ,chrome molybdenum vanadium steel.