Dynabrade 50281 4-1/2" Dia. Disc Pad, Spiral-Face, Medium Density, 5/8"-11 Thread 
Dynabrade 51149 – 4-1/2″ (114 mm) Dia. Disc Sander Backing Pad
$30.86
Medium Density, 3/8″-24 Female Thread
4-1/2″ (114 mm) Dia. Disc Sander Backing Pad
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