Zario Performance Series Golf Tees includes (40) Zario Blue & Clear 3-1/4 Inch Tees and (10) Blue 1-1/2 Inch Tees. A 4-prong tee design allows as close to zero friction and low resistance between your ball and tee as possible. This allows the golfer to get off the tee cleaner, which leads to more distance. The multiple-level setup allows the golfer to use this tee in any circumstance and keep consistency when teeing off. The lowest blue line provides the highest ball level (Recommended for teeing off with driver). The middle blue line provides the second-highest ball level and the highest blue line provides the lowest ball level which can be used with irons for those tricky par 3's. The (10) Blue iron tees (1-1/2 Inch) provide an optimal launch angle for all irons and wedges. All while being a vibrant blue so you will not lose them after you stick it on the green.