ITEM: 400 Grit Aluminum Oxide Rectangular Polishing Stone MSC. MANUFACTURER: MSC. BRAND: MSC. MANUFACTURER PART: 25845. 400 Grit Aluminum Oxide Rectangular Polishing Stone Super Fine Grade, 1/2 Wide x 6 Long x 1/4 Thick (MOQ1, Pkg Qty1)CATEGORIES: Maintenance, Repair and Operational (MRO) Supplies. Files, Sticks & Stones. Polishing Stones. N/A. TOTAL RECYCLED CONTENT: 10.00%. POSTCONSUMER RECYCLED CONTENT: 1.00%. KEYWORDS: MSCFiles, Sticks & StonesStonesPolishing StonesN/A.