This product is an 8-pack of mixed rubber golf tees in US sizes, all crafted from durable rubber material. The mixed size design meets different golfing needs for various clubs and hitting requirements. These rubber tees are suitable for both indoor and outdoor golf scenarios. They work perfectly on golf hitting mats, driving ranges, and can be used with indoor golf simulators. The rubber construction offers good flexibility and stability, reduces friction to your club, and holds the golf ball steadily for better hitting experience, and is resistant to repeated use for long time service.