This National Stainless Steel Window Sash Spring Control 2-Pack N191544 is the perfect addition to your home improvement collection. Crafted in China, it features a durable and sleek stainless steel finish that complements any window hardware. With a height of 1.000 inches, a length of 2.750 inches, and a width of 8.100 inches, these screen-door-hardware pieces are versatile and easy to install. Their brand name is National and they are new and unused.