Light Duty 35–75 lbs Ball Bearing Side mount slides and European Epoxy slides
The Medium Duty class 75 lbs. – 120 lbs Includes Ball Bearing Side Mount and Undermount slides.
The Heavy Duty Load class 125 lbs. – 200 lbs in mainly made Ball Bearing Side mount slides.
The Extra Heavy Duty Load class up to 500 lbs. Ball Bearing Side Mount
Metal Drawer and Drawer Sides in the Medium Duty Class
How to Choose a Drawer Slide