Magnetic Mounting Disk, Flat Washer Type Standard, Material T409 Stainless Steel, Material Grade/Class Not Graded, Finish Bright (Uncoated), For Screw Size #8, Inside Diameter 0.19 in, Outside Diameter 2 1/2 in, Maximum Thickness 0.094 in, System of Measurement Inch, Minimum Thickness 0.094 in, Color Silver