https://www.ebay.com/sch/i.html?_nkw=Cubitron+2+Quick+Change+Depressed+Center+Wheel&_sacat=0&_dmd=2

Cubitron 2 Quick Change Depressed Center Wheel

Regular price
$427.00
Sale price
$307.00

Features 3M Cubitron II Type-Q quick change depressed center wheel uses ceramic aluminum oxide as the abrasive material All abrasive products that rotate or spin This 3M quick change depressed center wheel can be run at a maximum speed of 6,650 RPMs Specifications Wheel Color: Black Abbrasive Material: Aluminum Oxide Wheel Diameter: 9 in. Depressed Center Wheel Shape: Standard (Type 27) Center Hole Thread Size: 5/8/2011 Wheel Thickness: 1/4 in. Maximum RPM: 6650