Product Name: Aluminium Oxide Flap disc Materialï¼?Brown Aluminium Oxide, One-component resin, Fiberglass backing Abrasive Grit No.: 36-320# Features: High-quality Aluminium Oxide cloth, good flexibility, high tensile and better bending strength, low noise and no-clogging Specification: Diam. 100-180mm (Type-27 flat & Type-29 angled) Suitable for: metal surface grinding and polishing, weld seams grinding, rust removing