The Smart 20 grit foam-backed abrasive sheets from Staleks offer una an effective solution for precise and gentle filing. Packaged in 30 single-use pieces, they ensure hygiene and practicality, ideal for both professional and personal use. The 20 grit ensures una efficient sanding on a wide variety of surfaces, while the foam backing provides flexibility and comfort during application. Perfect for those seeking high-quality products, durability, and consistent performance.