9'' x 11'' 1913 (50 sheets per sleeve) waterproofAs a leading wet use abrasive, the 1913 siawat aluminum oxide series has been producing outstanding results for years thanks to such outstanding properties as high stock removal rates, optimal water resistance, long life and flexibility. Advantages Very high removal rate Extremely long lifetime Highly water resistant Highly adaptable to contours and shapes May be used wet or dry The market leading wet abrasive for years Applications Sanding off