Durable and sturdy: The drawer slides are made of high-quality 1mm cold-rolled steel, and the material is 1 times thicker than ordinary slides. After the test, the number of smooth opening and closing of the drawer rail has reached more than 100,000 times. Lifetime : 30 years. Double anti-rust: The surface of the drawer sliding rail is galvanized, which isolates direct contact between water and air, prevents the sliding rail from oxidizing and rusting, and improves corrosion resistance . Double Ball Bearing: Two sets of solid steel balls are used inside the ball bearing drawer slide rail to ensure smooth opening and closing of the slide rail. Full extension drawer slides can hold 45.4 kg, 18.1 kg more than regular slides. Full extensionLength: 350 mm, full extension length: 700mm. Left side mounting distance: 12.6 mm, right side mounting distance: 12.6mm. There are 8 screws in the card box on both ends of the product. Please push the inner ball bearing to the top of the sliding rail first, then connect it to the sliding rail. There are electronic installation instructions at the bottom of the link. Removable hidden function: The back of the sliding rail is designed with a removable buckle, which is more convenient to install. The rear end of the sliding rail is equipped with a rubber silent pad, and the noise is as low as 35 decibels, bringing a more comfortable home experience.