Introducing the new line-up of SAND-LOOP Series, the SAND-LOOP FLEX. FLEX is modeler’s sanding tool based on the real use experiences by GUNPRIMER’s development team and the global partners. Now it’s time to experience the amazing semi-permanent sanding performance. Size: 27x88x5mmIncludes 3 per pack 4 levels of grits optimized for painting (#200/ #400/ #600/ #800) Application of Duraflex Technology for semi-permanent use 5 to 10 times more durable compared to other typical products Ultra density sponge offers superior sanding experience Thick and compact size provides comfortable grip 100% wet-sanding friendly and can be cleaned with water for reuse High density sponge is laminated with urethane film providing a soft grip and firm sanding surface. Ultra high-heat adhesion holds the abrasive grains deeply rooted inside the backing therefore abrasive grains stay in place longer which increases its lifespan for semi-permanent use. Plastic residues come off easily due to roomy space between the abrasive grains.