FujiStar AF38M blue Abrasive Film, the backing is polyester film, with high flat surface and strength. It can be used to sand for wet and dry and has fast sanding advantage. Used as Velcro and PSA disc, and also suitable for different curved surfaces and paint polishing. Adopting the special treated high grade grain, semi-open strew grain technology and partial grits have special anti-clogging stearated coating. It can prevent clogging and stick efficiently, especially suitable for sanding auto putty and primer. AF38M FujiStar blue Film Abrasive has the excellent cutting performance, Perfect sanding surface, longer lasting with Durability. it's a same product as AF37M but a different color.