CORE Abrasives 78520 Type 29 Regular Density Abrasive Flap Disc with Fiberglass Backing, Zirconium, 5' Diameter, 7/8' Arbor, 120 Grit (Pack of 5): Industrial & Scientific. CORE Abrasives 78520 Type 29 Regular Density Abrasive Flap Disc with Fiberglass Backing, Zirconium, 5" Diameter, 7/8" Arbor, 120 Grit (Pack of 5): Industrial & Scientific. Type 29 regular density blending/finishing abrasive flap disc with zirconia alumina grit. Contaminant-Free for stainless steel. Ideal for ferrous metals (iron, steel, welds, etc) and low grade stainless steel. Type 29 shape- working angle built in to the disc. Plastic turbo-backing can be trimmed. 。 。 。
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