Supper-thin Nylon Polishing Disc. Feature: Anti-blocking and Dissipate Heat Easily, Without Smearing or Discoloring the Workpieces. Provide a Consistent, Uniform Finish. Smear Resistant and Have a Long Life. This Unitized Wheel is a Great Choice for Light Deburring, and Blending; It is Widely Used for Polishing and Grinding Hardware, Wood, Plastic, and Circuit Board Etc. Specifications: DIY Supplies: Metalworking Type: Abrasive Disc 1 Piece 150mm Supper-thin Nylon Polishing Disc for Stainless Steel Welding Spot Slot Grinding Model Number: NW150 Diameter: 150mm Inner Hole: 18mm / 12mm Thickness: About 6mm / 3 Mm Product Mix: Silicon Carbide Abrasives, Non-woven, Resin over Resin Optional Size: Dia. 150 X TH 6 X Bore 18mm Dia. 150 X TH 3 X Bore 12mm ( There is 1-2mm Error Due to the Processing of Different Specification. Please Feel Free to Buy It if You Do Not Mind ) Density: 5P - Soft 7P - Medium 9P - Hard 12P - Very Hard Grit: P180 -- Medium P240 -- Medium P400 -- Fine P800 -- Very Fine . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.