SpitFire flap disc design comes equipped with new features:Diameters of 4-1/2", 5", and 6"5/8" x 11, or 7" Spin-On arborGrit range of 40, 60, 80, and 120Comes in packs of 10Competitively pricedMade in Germany, our new flap discs are designed with an internationally protected unique formula for optimal grinding, blending, & finishing. Our flap discs are eco-friendly, requiring 50% less energy to produce., and the flaps are usable right down to the backing. The backing plates are plant-based and made from hemp, absorbing hear & sound, all while being more impact resistant versus fiberglass. To l