SPI 52 Piece  Precision Gage ball Set 1/8" to 1" 

Minimum Diameter (Inch): 1/8

Maximum Diameter (Inch): 1

Accuracy Grade: 24

Material: Chrome Steel

Sizes Included (Inch): 1/8; 9/64; 5/32; 3/16; 7/32; 1/4; 9/32; 5/16; 11/32; 3/8; 13/32; 7/16; 15/32; 1/2; 17/32; 9/16; 19/32; 5/8; 21/32; 11/16; 23/32; 3/4; 13/16; 7/8; 15/16; 1; Tolerance (Decimal Inch): 0.000100