At Quality Glass Block and Window Company, our glass block vents provide a sense beauty and illumination while offering a high level of security. Our vents are built to allow ventilation at intervals you choose, while tightly closing for significant energy efficiency when you don"t need them. We offer several size, color and energy efficiency options. We design our vents to adhere to mortar or silicone, and we only use the highest quality materials for durability. When purchasing our Quality Glass Block Ventilators, our experts can help determine product specifications based on your application.