Franklin Sports MLB Industrial Grade Batting Tee - Heavy Duty Batting Tees for Baseball - Tee Ball Stand and Softball Hitting Tee - Adjustable Batting Tee for Youth - Durable Rubber Baseball Practice Batting tee for T-ball, softball, baseball. Manufacturer's suggested age: 7+ All-weather design; Heavy-duty 11.25 pound tee Adjustable height from 20 to 40 inches Features weighted steel for added stability No hardware assembly. Simply screw post to base