Tuffy tees are the official batting tees of Major League Baseball. Used daily by major league players, coaches, managers. Molded of high strength polyurethane with new pro-style tip. Ten year warranty. Adjustable height. Quick and easy break-down. Jim Lefebvres comprehensive training program included. Tuffy Single features molded-in steel plate counterweight. Correct ball placement forward of plate. Adjustable from 21" to 39". Pro-style tip