Material technology：finish cold rolled steel prevents it from rusting,Durable and wear-resistant Type: 2pcs PR 182mm/8inch , 214mm/9inch , 246mm/10inch , 278mm/11inch , 310mm/13inch , 342mm/14inch , 374mm/15inch , 406mm/16inch , 438mm/17inch , 450mm/18inch Side mounting Super Smooth Quiet: Built in double row solid steel ball, smooth and accurate sliding, move quietly and stable. Rubber brake design reduces damage caused by drawer switch collision, silencers shock orption, increase service life. Full Extension: 2 folds structure drawer slides help to open or close the keyboard drawer completely, to maximize the use of space and reach the most inside stuff 17mm/0.67inch width Thickness 0.8mm 20kg The inner rail can be detached by pressing the buckle for easy installation,The rear end of the slide rail is equipped with a rubber mute pad., Manufacturer: SCMYZLYD