Features: 1Easy to install and it doesn't need any other tools don't take too much time to complete the installation which is very convenient to use. 25 mm in diameter so your hole should be equal to or slightly smaller than 5 mm for making dowel pins a tight fit. 3Can use them for cabinet bookshelf display cabinet furniture wardrobe closet cupboard bookcase which are essential for your daily life. 4Prevent the shelf from shaking which makes the board strong enough to maintain a level and stable state. 5Made of ABS and zinc alloy materials which are durable and sturdy not easy to wear and tear so that you can use for a long time. Specification: Item Type: Shelf Support Material: ABS Plastic + Zinc AlloyColor: TransparentHeight: Approx.16mm / 0.63inHole Diameter: Approx.5mm / 0.2inInstallation Thickness: 10-30mm / 0.39-1.18inWeight: Approx. 110g / 3.9ozFunction: Decorative furniture feet to achieve the effect of heightening and beautiful cabinet shelf support Package List: 50 x Shelf Support Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.