Installation note Suitable for 28-30 inch drawers.The space between drawer and cabinet wall need to be 0.75in each at left and right sidetotal 1.5in inside cabinet width – outside drawer width= 1.5in Note:For installationmake sure the two slide rails parallel to each otherand make sure the drawer portion slides parallel to the cabinet portion slides and in the same level. without mounting screws includedyou can purchase different M5 screws according to your specific installation scene. MAXIMUM LOAD CAPACITY:220 lb The slides is made of 2mm thickness high-density Q235 cold-rolled steel plate tensile strength>400MPait will keep your drawers stable and safe even carrying up to 220 lb heavy weight itemswhich take opening and closing test 150000 times under full loaded without damage. Note:The shorter the slidethe heavier the weight load. 30 years service life The drawer slides’ surface are treated with electroplated blue zinc therefor it’s with oxidation resistance and anti-corrosion ability the service life of the slide rail could be 30 years at least. MAXIMUM LOAD CAPACITY:220 lb The slides is made of 2mm thickness high-density Q235 cold-rolled steel plate tensile strength>400MPait will keep your drawers stable and safe even carrying up to 220 lb heavy weight itemswhich take opening and closing test 150000 times under full loaded without damage. Note:The shorter the slidethe heavier the weight load. 3-fold full extension Slides Width: 2.08″ 53mm–length:28″ 700mm–Fully extended length:56″1400mm-Maximum load-bearing: 220 lb/100 kg. The “3-fold full extension”enable the slides to fully extend so the drawer can be pulled out completely which allows for the entire drawer’s storage to be accessed easily; Application range: Goods shelf Industrial drawersMechanical Cabinets RV Truck Vending machinesafety drawers exhibition drawers heavy truck drawersetc.