Starter tee with fully telescoping tee arm for height adjustment from 21" - 29" ~ Improves swing mechanics and body positioning ~14" flexible base returns the tee arm to the starting position after any contact ~Sets up instantly, rolls up for compact carrying and storage ~Great youth starter tee for individual practice or t-ball games ~Most Durable, Stable and Portable of any batting tee. ~Will not tip over. No outside weight needed. ~Longest guarantee and lowest price for a pro style tee ~Always-feel-the-ball flexible top. ~Unlike similar designed tees, our patented internal interlocking bolt design prevents slippage of the upper tee stem.