The 7990 SIASPONGE block hard offers fast, efficient surface treatment with a compact, ready-to-use design. Engineered for durability and edge stability, it delivers excellent results on wood, plastics, paints, lacquers, and composite materials. Ideal for tradespeople seeking a versatile, time-saving solution for both coarse and fine sanding.Features and Benefits Low-clogging design reduces downtime and maintains sanding performance Colour-coded system allows quick and easy identification, streamlining product selection for different applications Usable wet or dry to suit varying job site conditions, offering flexibility in both interior and exterior environments Coated on all four sides for maximum usability, making it ideal for sanding flat surfaces and inside narrow rebates High edge stability supports consistent pressure, allowing for precise results when sanding tight corners or contours Compact and ergonomic block design fits comfortably in hand, making it easy to manoeuvre durin