Louisville Slugger&reg; YBXCP Catalyst Plus Composite Youth Baseball Bat (-12) Drop (Weight-to-Length Ratio): -12--"Drop" is a weight-to-length ratio of a bat. Certain drops are required or limited for use in different leagues. Bat Material: Composite--Offers a combination of high performance and durability. Bat Grip: Synthetic Grip--Provides you with a tackier grip for a better feel. Model Number: YBXCP Barrel Size: 2" Barrel