The VIS 6" Flapwheels are designed for the VIS-Polish Robotic Wheel polisher. These flapwheels offer an injection molded hub, a flapwheel securement ring, a new type of sanding paper and improved longevity. VIS developed their 6" flapwheel to provide the flexibility of a 5" hub and the rigidness of an 8" hub, according to the company.