Features: Make from Aluminum Alloys, smooth, not easy to rusts and corrosion resistance. The screw with silicone tip will grip the glass more firmly. No need drilling on the glass, just fix the glass clip at wall, Put the glass in it and screw on, very easy and quick to install. Suitable for indoor and outdoor glass shelves, such as living room, shower room, school classroom, conference room, kitchen, wine coolers and other place. Widely used in fixed glass shelves, such as bathroom glass shelves, wine cabinets, display cabinets. Specifications: Materials: Aluminum Alloys Styles: 30-10mm/30-12mm/40-10mm/40-12mm/60-10mm/60-12mm 30-10mm size: about 2.9x3.1x1.1cm/1.14x1.22x0.43inch 30-12mm size: about 2.9x3.1x1.3cm/1.14x1.22x0.51inch 40-10mm size: about 3.8x3.1x1.1cm/1.50x12.2x0.43inch 40-12mm size: about 3.65x3.1x1.3cm/1.44x1.22x0.51inch 60-10mm size: about 5.8x3.1x1.1cm/2.28x1.22x0.43inch 60-12mm size: about 5.8x3.1x1.3cm/2.28x1.22x0.51inch Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color. Package includes: 8pcs Square Glass Shelf Clamp Clip