The G Tee was engineered to standards unmatched by any other batting tee and is built using only the finest components. The telescoping upright is height-adjustable, so hitters can get the perfect hitting height. At the maximum extension, it is ready for high-ball drills. Seals and bushings at the core of the upright maintain the height and ball cup, no matter how many times you swing. The base of the G Tee is made of polyethylene to resist fading or warping. At the center of the base are the quick-change stabilizer and lock pin that securely hold the upright in place. Designed for quick assembly. Two-year manufacturer's warranty.