Plastic Ball Stock, Acetal Copolymer, Plastic Diameter 3/4 in, Tensile Strength 9,100 psi, Impact Strength 1.1 ft-lb/in, Plastic Diameter Tolerance +/-0.002 in, Plastic Hardness Rockwell M90, White, Weight 0.2 lb, Grade Standard, Friction Coefficient 0.35, Plastic Clarity Opaque, 0.051 lb/cu in, Tensile Strength Rating Good, Water Absorption 0.22 Percent, Standards UL 94 HB, Minimum Temperature -50 Degrees F, Maximum Temperature 180 Degrees F, Package Quantity 10