Bat is marked BPF 1.21 but should be used for. Home Run Derby's and Outlaw Leagues. Not responsible for use in Senior Softball Leagues.The item "Worth Launch 510 Senior Home Run Derby Bat Free shipping" is in sale since Saturday, September 03, 2016. This item is in the category "Sporting Goods\Team Sports\Baseball & Softball\Bats\Softball-Slowpitch". The seller is "sschaub44" and is located in Cibolo, Texas. This item can be shipped to United States.