This model is the same as the 543 model. From DTB this bat has the AP5 handle with a 243 barrel. Good sized barrel with a decent balance and a lot of pop.   Fully Customize your bat here -wood, stain, finish and logo colors!  The sky is the limit! SPECIFICATIONS: This bat comes with a small flared 1 15/16" knob, a 2 17/32" barrel, and a 15/16" handle. Bats have cupped ends when necessary to create optimum balance & weight differential.Option Notes: This product is NOT available for a rush. Engraving: Name and number will be engraved as spelling appears. It is up to the discretion of DTB to refuse to engrave inappropriate language or phrases.  We can not engrave professional teams or players names or colleges  due to trademark rules without written consent. Engraved bats are non returnable. Cupping: No cup option, when available, will be accurate within +-.5