Features: brand new and high quality Durable material: high-quality cold-rolled steel, rust-proof and durable. Rebound slide: No matter where you for touch the panel, the drawer will open easily. Solid steel ball: The double-row solid steel ball design makes the track smoother and quieter, wear-resistant, durable and not easy to wear. Anti-dropping buckle: The anti-dropping and disassembling buckle makes the guide rail easy to install. Three-section track: all three-section tracks are pulled out, which makes more use of drawer space and has excellent smoothness. Specifications: Material: Cold Rolled Steel 12 Size: Approx. 300x45mm/11.81x1.77inch 14 Size: Approx. 350x45mm/13.78x1.77inch 16 Size: Approx. 400x45mm/15.75x1.77inch 18 Size: Approx. 450x45mm/17.72x1.77inch 20 Size: Approx. 500x45mm/19.69x1.77inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Pair Drawer Slides