Various sizes of steel balls such as: 7/8"(22.225mm),1"(25.4mm),1 1/8"(28.575mm),1 1/4"(31.75mm),1 3/8"(34.925mm),1 1/2"(38.1mm),1 9/16(39.688mm),1 5/8"(41.275mm),1 3/4"(44.45mm),1 7/8"(47.625mm),2"(50.8mm),60mm,2 3/8"(60.325mm),2 3/4"(69.85mm),3"(76.2mm),80mm,22.125/22.325mm,25.3/25.5mm,28.475/28.675mm,31.65mm,31.77mm-31.87mm,34.94mm-35.10mm,38.0/38.2mm,39.70-39.80mm,44.46-44.57mm,44.94-45.06mm,49.94-50.06mm,50.7mm,50.820-50.920mm,59.94-60.06mm etc.