Features: Make of stainless steel, rust and corrosions resistant, ensuring long term use. Double layer cushioning pad, effective nonslip and shockproof, cushioning fixed fit without slipping. Adjusting screw length to clamp glass/acrylic of different thicknesses. These Standoff Screws have complete accessories, convenient and beautiful installation, and can be used in a variety of scenes, suitable for glass, doorplates, billboards, posters. Not limited to billboards fixation, it can also be used for the installation of decorative items such as picture frames and glasses. Specifications: Component: Stainless Steel Size: A/B/C/D/E/F size/G/H/I A Size: about 25x20mm/0.98x0.79inch B Size: about 25x30mm/0.98x1.18inch C Size: about 25x40mm/0.98x1.57inch D Size: about 25x50mm/0.98x1.97inch E Size: about 25x60mm/0.98x2.36inch F Size: about 25x70mm/0.98x2.76inch G Size: about 25x80mm/0.98x3.15inch H Size: about 25x90mm/0.98x3.54inch I Size: about 25x100mm/0.98x3.94inch Package Includes: 20Pcs Glass Fasteners note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.