stone granite marble Demi bullnose countertop sinkwork cut polish sanding disc

B5 is for 5mm (3/16") thick or Hogh stone concrete travertine to do DEMI / ROUNDOVER shape bullnose. B10 is for 3/8" (10mm) Thick. B13 is for 1/2" (13mm) Thick. B20 is for 3/4" (20mm) Thick. B25 is for 1" (25mm) Thick.

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