Size, Color, Affordability.
Flat-Tee™ comes in both 1/4" (6.35mm) and 3/16" (4.76mm) heights. The 1/4" tee is designed for use with long irons and hybrids. The 3/16" tee is designed for use with short irons. By integrating a low friction ventilated tee head into the flat base, Flat-Tee™ holds the ball stable every time. At only pennies each, Flat-Tee™ is a real, consistent, golf tee, approved for regulation play.

Design
Flat-Tee™ Conforms to USGA Rules of Golf. Flat-Tee™ is designed to work perfectly on everyday synthetic driving range mats, as well as traditional grass tee boxes. Hitting from a traditional tee is an imperfect exercise as the exact height of the tee cannot be duplicated every time. With Flat-Tee™ it's now a science. The Flat-Tee™ low friction ventilated tee head has less surface area, promoting a higher spin rate and higher launch angle, resulting in increased distance and accuracy, and the ability to better shape your shots. Raising the tee off the mat may reduce the risk of personal injury and damage to clubs. Flat-Tee™ is injection molded using a proprietary blend impact modified nylon, making it virtually unbreakable.
Flat-Tee™ makes a perfect ball marker, as well.