This robust golf tee offers high durability and even more distance performance, and is guaranteed to last for 500 shots. The spring loaded tee been internally tested up to 400,000 consecutive hits, and test results show less friction for more driver distance, consistent tee height, and confirms to USGA and R&A rulings. The tees are colour coordinated for different tee heights, Blue 3 1/2 ", Yellow 3 1/8 ", Orange 2 3/4 ".