Cap Size: 12mm x 5mm/0.47" x 0.2" (D*H); Screw Total Size: 6.7mm x 20mm / 0.26" x 0.79" (D*L); Screw Thread Size: 3.2mm x 17mm / 0.13" x 0.67" (D*L)Rubber Washer Size: 8mm x 3.7mm x 1.2mm / 0.31" x 0.15" x 0.05"(OD*ID*T); Metal Washer Size: 9.5mm x 4.5mm x 2.5mm / 0.37" x 0.18" x 0.1"(OD*ID*T)Solid brass construction, ensuring durability and longevity. Polishing to resist daily corrosion, tarnishing.Will not crack or fall apart like cheap plastic covers; smooth surface, make the screws look beautiful, easy to install and clean.Widely used in mirrors, tea tables, glass sign, other wood or glass furniture.