Shandong donge huatao steel ball is a specialized enterprise which gathers scientific research and development,production and sales together. Its main products includes high quality GCr15, special material balls with diameter from 0.5mm to 60mm,vibration value as zz group,precision as G20,G16,G10,G5 level,produced using special technology according to GB308-89 and ISO3290 standard matching high precision, low noise bearings,and can also produce grade 60,100,200,500,1000,2000 according to customer&＃039;s orders.