Neiko 30263A - 6 inch Sanding Discs Hook and Loop, 5/16” Arbor with 24 Thread Mounts, 10,000 RPM, Sanding Pads for Orbital Sander and DA Sander, Hook n Loop Backing Pad :
619.153MH RUPES Velcro Long Bed Backing Pad - PowerToolSalesUK.com
Turbo Multi-Hole Velcro Backing Pad for Random Orbital Sanders, 6" (152mm) Dia, 5/16" + M8 (Festool-Fit) Thread - SAIC Ltd.
VELCRO® Brand VEL-LOC® 175mm x 500mm PS18 Adhesive - For Sanding Pad Replacement
FLEXIPAD Sanding Backing Pad 180mm VELCRO® Brand M14 x 2 for Sander & Polishers, at D&M Tools