GP41011 Resupply kit for DIY GP-WIZ Glass Scratch Repair kit / 3 inch / Sanding discs plus polishing pads Discs diameter 3 inch Resupply kit for our DIY Glass Scratch Repair Kit (GP-WIZ) Attachment method : Hook and Loop fastener to be used with any Velcro backing pad Kit contains :10 x GP50 fine sanding discs /10 x GP100 medium sanding discs / 10 x GP150 coarse sanding discs / 2 x Felt Polishing Pads