Baseball Pow'r Wrap. Fits 2 5/8" and 2 3/4" diameter bats, wood or alloy/composite. Weighs 24 ounces. Legal for use in all adult baseball leagues. Used by all the major league teams. Tough polycarbonate plastic will endure for years. Weighs more than most donut weights and distributes weight more evenly on barrel of bat. Works the specific muscles used when hitting. Used by professional sluggers for over 22 years. The batting warm-up weight for the 21st century!