3M Hookit Blue Abrasive Sheet Roll, 321U, 36190, 150, 2-3/4 in x 13 yd (69.85 mm x 11.88 m) The 3M Hookit Blue Abrasive Sheet Rolls 321U are sanding sheets made with a blend of premium aluminium oxide and ceramic grain, designed for paint preparation and coatings removalThey feature a multi-hole pattern for dust capture and perforations for easy sizing. Product Information Brand 3M Part # 7100091039 Backing Material Paper Color Blue Grit 150 Length 13yds Width 2-3/4 Inch Material 321U Mineral Ceramic Alumina Origin Country Canada Product InformationAvailable in various grades for different sanding needsBlends ceramic and aluminium oxide for effective sandingDesigned for extended sheet life with an anti-loading coatingHookit hook-and-loop for easy attachment and reuseMulti-hole pattern captures dust, reducing loadingPerforated sheets for easy sizing and reduced wasteSuitable for paint preparation and coatings removal