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 and, at 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.