Starke 7" x 7/8" Sandpaper (100 per box) available in 36-400 grit.
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3M Stikit coated 426U PSA disc roll uses silicon carbide as the abrasive material and have a pressure sensitive adhesive back.
3M Wet/Dry 9"x11" Sandpaper is excellent for stone, metal or woodworking.
Starke 5" Velcro Sandpaper (50 per box) available in 60-800 grit