Great for baseball, softball, youth leagues, and tennis players to improve their swing. Eliminates tee shyness, which causes players to swing high and avoid damaging the tee. Has a reinforced Fabric Nozzle that pops back up instantly with no damage. Powerful blower motor suspends the ball on a column of air. Durable Steel Blower units stand up to years of abuse. Compatible with most lightweight practice and tennis balls.