2 balls in 3 different sizes to be sure you get the right fitPremium grade 440C stainless steelPrecision G25 grade ballsItem Package Dimension: 4.0" L x 3.0" W x 3.0" H Product Description BC Precision has a full line of precision balls Chrome Steel Balls AISI 52100 chrome steel BallsGrade 25 to 100Sizes range from 1/32" to 5" in diameterSmall and large quantities availableStandard and metric sizes in stock Carbon Steel Balls AISI 1010 carbon SteelGrade 100 to 1000Sizes range from 3mm to 2 inches in diameterSmall and large quantities availableStandard and metric sizes in stock Stainless Steel Balls AISI 440 stainless steelGrade 5 to 100Sizes range from 3/64" to 3" in diameterSmall and large quantities availableStandard sizes in stock Si3N4 & ZrO2 Ceramic Balls Si3N4 & ZO2 Ceramic BallsGrade 5Sizes range from 1/16" to 3/8" in diameterSmall and large quantities availableStandard and metric sizes in stock Track Page Views WithAuctiva's Counter