1) Material: work hardened cold rolled steel 2) Length: 300mm - 700mm (12" - 28") 3) Load rating: 30kg/450mm (18") 4) Finish: galvanizing blue zinc ,black 5) simple installed with sides buffer and self-closed function ,adjustable top 6) Application: a) cabinet b) office cabinet c)household drawer full extension slide(extension slide self-closing slide)