Marv's newest pitching machine ball replicates an actual baseball but at a lighter weight. - Nearly identical Velocity and Spin as a typical baseball out of machine - Leather Cover with Foam Core - Durable Japanese Kevlar Seams - 3.6-3.7oz  - Forgiving benefits of a foam baseball on the hands and bat - Consistent ball flight from high velocities at max distances - Nearly identical Velocity and Spin as a typical baseball out of machine -Sold by the Dozen