Features: selection material,heavy bearing ,durable anti-corrosion corrosion resistant,you can use for a long time.Various application,the slides can be applied to your office desk, cabinet, furniture hardware , kitchen drawer, keyboard drawer,tools organizer accessories,dresser drawer tracks , store fixture and more usages.Humanized detail design ,equipped with steel ball bearings and cushions to ensure smooth sliding of the slides, reduce noise and achieve quiet performance.Adjustable 6 holes heights to meet different person's height requirements more convenient.Easily to install,it takes only a few minutes to install the slides. Package Includes:1 Pair Keyboard Slide Specifications:Material:IronySize:As Picture ShowesColor:Black note:Please allow 1-2cm errors due to manual measurement.Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item.