This PRIME-LINE N 6870 Mirror Door Roller has a sturdy construction that ensures smooth and effortless sliding of mirror doors. With a length of 3-3/4 inches, it is compatible with most standard mirror doors. The brand name and model number clearly indicate its compatibility and reliability. Ideal for both business and industrial use, this roller offers an efficient and durable solution for your sliding mirror door needs. The easy installation process makes it a hassle-free upgrade to your current door setup. Invest in this high-quality product for an enhanced sliding experience.