A baseball has three basic parts: the round cushioned cork pill at its core, the wool and poly/cotton windings in its midsection, and the cowhide covering that makes up its exterior.

The pill consists of a sphere, measuring 13/16 of an inch (2.06 centimeters) in diameter, made of a cork and rubber composition material.

The process of assembling a baseball involves two types of workers: assemblers (who assemble the core parts of the baseball) and sewers (who stitch the cowhide covers onto the baseball by hand). There are 108 stitches in the cowhide leather of each ball, and each is done by hand.

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