Introducing the Smooth Zinc Alloy Twin Shower Door Runners Rollers23mm 2 Top 2 Bottom 4 Total, a high-quality product perfect for your bathroom needs. This set includes 4 shower door rollers replacements with a clip-on attachment mechanism, making it easy to use and install. The rollers housings are made of durable zinc material and come in a sleek silver color with white plastic rollers. They are lightweight and easy to maneuver. These rollers are suitable for glass shower doors and are a great way to keep your shower doors gliding smoothly.