Features: 1) Materials: silicon carbide 2) Open, semi-open or close coated available 3) Specially designed for Marble sanding & grinding 4) With German E weight backing paper, specially sold to USA 5) OEM is availableIdeal storage conditions:1) Temperature: 15 - 25C 2) Relative humidity: 50 - 65% 3) Keep materials away from heat sources and avoid direct contact with the floor
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