If you are seeking a heavy duty commercial roll up door, the Model 1950 HD is the perfect fit for your needs. Our Model 1950 HD utilizes a 9 ½” drum wheel and is manufactured for frequent use. The door comes with a one year limited warranty, which ensures that you will receive a quality product. Other features and door measurements are as follows: Maximum opening size of 12’ wide x 14’ high (168 sq.ft.) Push-up, hand chain and electric operations