Pack of 100, 70mm Black golf tees with White mark Material: 100% Bamboo, biodegradable material instead of plastic High Quality : Strong for use, virtually unbreakable, environmentally friendly paint is non-toxic. Standard Size: meet the regular size required for golf practice, top cup diameter: 0.44 Inch Perfect Design: The bamboo material is straighter and smoother, and the golf tee has markings to help you perform more consistently.