Precision Ball,440CSS,3/16In,Pk100
0001 in, Fabrication Cold Finished, Heat Treatment Through Hardened, Heat Treatable Yes, Mechanical Finish Polished, Not Applicable Brinell Hardness, C58 to C65 Rockwell Hardness, Includes Material Certificate Yes, Standards ANSI/ABMA, Minimum Temperature -300 Degrees F, Maximum Temperature 1,200 Degrees F, Appearance Mirror-Like.