Product Information Description Measuring Guide Other Details Three piece silver plastic grommet Top flange diameter: 95mm Cutout diameter: 79mm Opening diameter: 35mm Price per box of 10 Office Ergonomics - How To Do I Need A CPU Holder? How To Reduce Back Pain Ergonomic Desks & Tables Need It Fast? We Can Help! See Our International Shipping Options Request A Quote Today Circle Grommets, by Richelieu, are three piece silver plastic units. The top flange is 95mm in diameter and the center opening measures 35mm.