NORTON, 4 in Dia x 1/2 in T, 5/8"-11 Internal-Thread, Hook-and-Loop Disc Backup Pad - 2D511|66261059304 - Grainger
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Norton Air-Cooled Medium Rubber Back-Up Pad, 7" Diameter, 5/8"-11 Arbor, 8600 rpm (Pack of 5): Sanding Disc Backing Pads: Amazon.com: Industrial & Scientific
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Norton AVOS Edger Speed-Lok Back-up Pad, 4-1/2" Diameter, 5/8"-11 Sawtooth Arbor, 13000 rpm (Pack of 5): Sanding Disc Backing Pads: Amazon.com: Industrial & Scientific
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