Ceramic ball
Fracture- and Thermally Shock-Resistant Silicon-Nitride Ceramic Balls. Color: Black. Max. Temperature: 1470 F. Porosity: 0%. Compressive Strength: 550, 000 psi. Often used to create bearings, silicon-nitride ceramic is harder than many types of bearing steel but is lightweight and can be easily polished. It also withstands high temperatures
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