High load capacity: Supports up to 100 pounds, capable of holding heavy drawers. Width of 45mm: Fits standard drawers and carries a reasonable load. 3-stage full extension ball bearing slides: Allows for greater extension when the drawer is pulled out. Set includes 10 pairs of drawer slides, accommodating 10 drawers. Cold-rolled steel material ensures smooth drawer opening without excessive resistance. Specifications: Item Type: Drawer Slide Width: Approx. 45mm/1.8 inches Load Capacity: 100 pounds Material: Cold-rolled steel, solid double row steel balls Surface Treatment: Electrophoretic black Material Thickness: Approx. 1.2mm/0.05 inches Installation Guide: 1. Open the package. 2. Remove the inner slide from the main body of the drawer slide. The spring lock on the back facilitates removal. 3. Install the outer and middle slides onto the drawer sides, then attach the inner slide to the drawer's side panel. Pre-drilled holes in furniture make installation easier. 4. For best results, install the drawer as a whole unit. Use the two holes on the slide to adjust the drawer's vertical and front spacing. Ensure left and right slides are level. 5. Secure the inner slide with screws, aligning it with the pre-installed outer and middle slides. 6. Tighten the corresponding screws. 7. Repeat on the other side, ensuring both inner slides remain horizontal and parallel. 8. If the slides are not level, adjust the outer or inner slide positions for proper alignment. 9. Test the drawer's movement after installation. Smooth operation indicates successful installation. Package List: 20 x Drawer Slides