Quick Details Disc Type:FLAP DISCS Grit:240, 120, 320, 80, 40, 220, 60, 36 Place of Origin:Henan, China Brand Name:Yihong Abrasive:Zirconium Corundum Substrate:fiberglass backing pad Outer Diameter:115 Inner Diameter:22 Size:4inch Diameter:115mm Layers of fibergass:8 layers Metal ring:2 ring Hole diam.:22.23mm Full Outer diameter:100mm,115mm,125mm,150mm,180m,230mm Colour:Brown, Blue, Grey All hole diameter:16mm,22.23mm All metal rings available:1 or 2 Backing surface:black paper or non-woven cloth Exported countries:Germany,Italy, Turkey, Brazil, India and other countries