NSA Slowpitch Softball was founded in 1982 by Hugh Cantrell out of Kentucky. NSA Slowpitch Bats use the same testing that USSSA uses. NSA also has girls fastpitch leagues and tournaments that use NSA Slowpitch Bats. NSA has a pitching arc of 4 foot to 10 foot while using NSA Slowpitch Bats. The umpires call a strike zone similar to usssa while playing with NSA Slowpitch Bats. All NSA Slowpitch Bats have to be no longer then 34 inches long. All NSA Slowpitch Bats can weigh no more then 30 ounces. All NSA Slowpitch Bats have to pass the certification test to be used in leagues or tournaments. All NSA Slowpitch Bats are subject to field compression test at the ball fields. Composite alloys are allowed on all NSA Slowpitch Bats. All NSA Slowpitch Bats come with a 1 year warranty. Thanks for buying your NSA Slowpitch Bats from Kelly's Ultimate Sports and enjoy it.