特种钢球， 特大轴承钢球，大型钢球，特大钢球：
1.特大轴承钢球规格:50MM----265MM
2.特种GCR15钢球具体规格:
50mm, 50.8mm, 53.975mm,54mm, 55mm, 57.15mm, 60mm, 60.325mm, 63.5mm,65mm,66.675mm,68mm, 69.85mm,70mm, 72mm,73mm,75mm, 76.2mm,79mm, 80mm,82.15mm,82.5mm, 85mm,88.9mm, 90mm,92mm,95mm,100mm, 101.6mm, 105mm,107mm,110mm, 115mm,120mm,125mm,127mm, 130mm,140mm,150mm,152.4mm,155mm,160mm,165mm,180mm,195mm,200mm,250mm,265mm