Rawlings RX4 Little league Baseball Bat (-13) Drop. Size is 31"/18oz. RX4 Youth alloy baseball bat features a Stiff Handle which generates a balanced feel for any type of hitter. The Thin RX4 alloy barrel with a new performance end cap and knob creates both a balanced and comfortable feel at the plate. 2 1/4" barrel Thin RX4 alloy barrel end-construction for consistent performance. 1.15 BPF-approved for Little League Babe Ruth Pony League AABC Dixie League USSSA and all other associations. 1 Year Warranty. All defects and Warranty issues on Non-wood bats must go through Rawlings. Contact Rawlings Customer Care at 1-800-Rawlings.