[Multicolor Scrub Sponge]: P150-green, P180-yellow, P240-purple, P320-blue, P400-orange, P600-red. 6 different colors for 150 to 600 different grain sizes. Easy to identify grades. From coarse to fine, it meets most of your grinding needs [Rhombus Abrasive Pattern]: The diamond-shaped design for dust extracts creates a clean, dust-free work environment. Soft Grinding Sponge Set is made of high quality alumina particles with sharp cutting edge providing longer wear life and better stock removal rate[Irregular Surface Sanding]: We have flexible sand blocks made of foam with a soft thickness, easy to squeeze the sponge to conform to any shape required. Perfect for sanding any cylindrical, round project, curved or uneven surfaces, corners.[Wet and dry sanding: washable and reusable, use plenty of water when wet sanding, soak the sponge completely and screw it well to keep it damp.[Manual Detail Sanding: This is the perfect size for any project, in any unbalanced space, and always within reach on every project. Great for detail sanding, small crevices around the edges, wood grain, metal polishing, plastic finishes.Color: mixMaterial: spongePackage Contents:18pcs sanding blockOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.