https://www.prosourcecenter.com/product/2441/sia-hook-and-loop-backup-pads-6-inch-7-hole/
Sia Hook and Loop Backup Pads 6 Inch 7 Hole - Pro Source Center
Sia 6" 7 Hole Siafast Hook and Loop Backup Pads. Hook and loop DA 6" backup pad. 7 vacuum holes. 5/16"-24 thread.
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https://www.wwhardware.com/mirka-5-backup-pads-mirka-backup-pads
5" Backup Pads
Mirka 5" backup pads for use on orbital sanders with single spindle attachment. 5/16" 24 thread. MA915GV designed for use with Abranet discs.
backup pads
https://www.mcmaster.com/products/backup-pads-for-flat-sanding-discs/
Backup Pads for Flat Sanding Discs | McMaster-Carr
Choose from our selection of backup pads for flat sanding discs, including over 110 products in a wide range of styles and sizes. Same and Next Day Delivery.
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https://www.autobodytoolmart.com/product/3m-stikit-5-disc-backup-pad-05575/auto-body-sanding-tools?fromp=category
3M Stikit 5 Disc Backup Pad - 05575 | Automotive Sanding Disc Pads
Specially made for use with 3M Stikit Discs Vinyl pad face provides good disc adhesion yet allows easy disc removal Pad is lightweight, shock-resistant and...
sanding padsdiscbackupautomotive