The Gorilla Pro-Model Batting Tee is ridiculously strong, completely weather-proof, and willing to take a serious licking. It is portable, able to be assembled and knocked down in second. Each Pro-Model Batting Tee comes with three high-quality, durable rubber ball rests that are easily replaceable any time you beat one up. It also includes drills, instructions, and the “Gorilla Guarantee” warranty. This is a serious tee for serious ballplayers, and it telescopes between 24” to 43”.