Check the listing for details. 5Pcs 4-1/2" 320 Grit Polishing Grinding Buffing Wheel Flap Discs Angle Grinder. Color: Maroon, Condition: New. Listed at 18.99 USD. Nylon Material : Nylon, also called polyamide fiber, features higher abrasion resistance than all other fiber. And it‘s relatively non-aggressive nature makes the flap discs excellent finishing tools. Aluminum Oxide Abrasive: Made of chosen aluminum oxide abrasive which provides clog-resistance, fast cut rate, consistent finish Open Mesh Construction: A web of nylon fibres are bonded together and saturated with aluminum oxide abrasive grains. This produces a cushioned, three-dimensional material that is heat-dissipated, pliable, flexible and long-lasting. Also conforms easily to surface contours and shapes! Fiberglass Backing Plate: High quality special structure of 8-layer fiberglass mesh screen. Features extra strength, light weight, ability to absorb vibration, and operator comfort Flat Type 27 Shape: Better work from a 0-15° angle and are the best suited for smooth finishing. The flat-angled flap discs are primarily used on flatter surfaces. Extremely popular and lauded the best choice for finishing Materials • Stainless Steel • Standard or Alloyed Steel • Non-Ferrous Metals and Alloys Machines • Right Angle Grinder Operating Speed • The speed at which the wheel is run affects product finish, rate of cut, and wheel life • Cleaning and upgrading of surface conditions: 1,900 - 5,100 RPM • Decorative Finishing: 450 - 2,550 RPM Specifications Color: Maroon Material: Nylon Abrasive: Aluminum Oxide Shape: Flat Type 27 Diameter: 4.5 inch Arbor: 7/8 inch Max RPM: 13,300 Grit: 320 Fine Grade Machines: Right Angle Grinder Application: Cleaning, Finishing, Buffing-up Quantity: 5 PACK