... Sepcification:Name:Ball bearing slide rail,drawer slide 1,Range to apply: office desk drawer,cabinet 2,Features: swift ... . 3,Loading: 55 pounds(25kg)/group,(16"slide). 4,Surface treatment: blue zinc,colorful zinc, ... black electricity coat. 5,Material: High tension cold-rolled plate. 6, ... ,please feel free to contact with us. 3504 ball bearing slide rail,drawer slide