Below is a list of Ceramic Balls manufacturers from Portola Valley, California. Ceramic balls are spherical objects made of inorganic, nonmetallic materials that are used in many industrial, commercial and residential applications involving rotary or linear motion in addition to a number of other functions. Ceramics are used in many applications wherein durability and resistance to corrosion and high heat are essential. As a result, several types of ceramic balls offer greater hardness, higher stiffness, lower thermal expansion, lighter weight and higher electrical resistance than even their steel counterparts.