The Purple-Lea Mill Treated Cotton Airway is a practical and efficient tool for secondary cutting. Made with mill treated cotton cloth, it is specifically designed for use on aluminum and stainless steel surfaces. With a 5/8 inch arbor hole, it is compatible with most makes and models. This product is sold individually and is available in wheel sizes of 8 and 10 inches. It is recommended to use with suggested rouge bars such as green chrome, white chrome, and tripoli. Experience the benefits of this reliable and versatile airway for all your cutting needs.