Easy Installation——A detailed installation video is available on the product page for reference. The product comes with detailed installation instructions to help you install easily whether you are using it for a new drawer installation or as a replacement part for an old rail. Suitable for diy projects Bottom Mounted Design——Our Ubisin center mount drawer slides are equipped with rear adjustable bracket and mounting screws, ensuring optimal stability and weight distribution even with heavy loads. Unlike traditional side-mounted slides, these slides offer superior durability and easy to install Premium Quantity Material——Ubisin drawer slides are made of high grade cold-rolled steel with zinc plated finish, heavy-duty and durable, load-bearing. Solid ball bearing ensure smooth opening and closing, good load capacity can serve you many years Measurements——Slides length: 22inch(559mm); Slides width: 1.37inch(35mm); Slides thickness: 0.39inch(10mm); Rear bracket length: 3.14inch(79.8mm); Rear bracket width: 1.93inch(49mm); Adjustable screws length: 0.63inch(16mm). Load-bearing capacity: 50 LB. Please choose the right size before you purchase our heavy duty drawer slides.Both product installation instructions and videos are provided Excellent After-Sale Service——We focus on quality and after-service. If you find any quality problem on our center mount drawer slides, please feel free to contact us, we promise solve it until you are satisfied. Replacements or other solutions would be provided for you. No Risk ASIN B0GHM2TXNP Color Silver Brand Name Ubisin Unit Count 4.0 Count Drawer Type Center Mount, Ball Bearing Item Weight 5.46 Pounds Finish Types Zinc Plated Manufacturer Ubisin Model Number 1222-1 Material Type Zinc Plated Steel Item Type Name cabinet-and-furniture-drawer-slides Number of Items 4 Included Components Case Maximum Weight Capacity 50 Pounds Item Dimensions L x W x Thickness 22 L x 1.37 W x 0.39 Th