The 2725 Dual Aluminum Sliding window is a HSC45 rated product. Featuring double slide action the 2725 Aluminum Sliding window utilizes the same durable sash system that is found in the rest of our 2000 series system. With the addition of a specially designed brass roller the 2725 Sliding window will provide you with smooth rolling action no matter what size window you choose. The 2725 Aluminum sliding window guarantees ease of operation, optimal ventilation, and a complementing look to every job. The dual operating sashes are designed to be simply lifted up and out of the mainframe from inside the house allowing you to clean the outside glass surfaces from the comfort and safety of the inside of you home or building.