Your kid will enjoy playing America"s favorite pastime with the Franklin Sports MLB Mariners Metallic Pearl Ball 12-pk. This 12-pc set includes a dozen official size 9" baseballs. The balls are made of durable PVC. The rubber filling gives each baseball a robust bounce. Easy cleaning is possible with just the wipe of a clean cloth. The best part of these Major League Baseball-certified balls is the awesome Mariners logo. A 90 day limited manufacturer warranty is included. Suggested for ages 6 and up.