Worth SBSIN-34 ASA Slowpitch Softball Bat (28-Ounce) Whiplash- Up to 30% thingger taper for reduced weight and increased bat speed TST- Thin Shell Technology Made with Lithium- Worth's strongest aluminum Approved by ASA, USSSA, NSA, ISF, ISA and all other associations 34 inches long and weights 28 ounces with one year warranty