Louisville Slugger 2011 TPX (-13) Warrior Baseball Bat High-performance youth baseball bat constructed of 7050 alloy with a -13 weight/length ratio 2 1/4-inch barrel size Patented Pro Cup end cap dampens vibrations Synthetic grip with a 7/8-inch standard handle Offered in sizes for 8 to 14 year old players; 1-year limited warranty 2011 model; backed by 1-year warranty 7050 alumuminum allow for excellent strength and durability Alloy bat for Youth League baseball play with -13 weight to length ratio ("drop") Patented Pro Cup end cap for a more balanced swing weight Synthetic grip offers a tackier grip for a better feel