With the purchase of the Tri Glass patented bridge you will receive a 1/2 ounce resin of your choice. One ounce of thin and thick resin are included in your basic windshield repair kit and two ounces of thin and thick resin are included in your professional auto glass repair kit. Our resins have been tested in the field for nearly 20 years. They are ideal for bullseyes, stars, and combination breaks.