This is an Industry standard Model Adult Wood Baseball Bat. The Birch Bats 141 has a very traditional feel. This model has a slightly smaller 1 15/16" squared off knob, a thin 7/8" handle and a 2 7/16" barrel and with a weight range -3. This is a bat for a gap/power hitter who likes a thin handle. We gear all our models to -3 unless asked for a heavier model.