【High Quality Material】The sanding blocks made from high-quality brown corundum and high density sponges as bases - Good flexibility and easy to use, No sand loss and long service life. 【Feature】Polishing sand block is great for sanding odd shapes, edges and into grooves.high-density and durable sponge inside, solid and no easy to break, also resistant to water, wear, acid and alkali. 【Washable and Reusable】The sanding paper are designed for wet and dry dual-use, so it can reduce flushing and improve work efficiency. these sanding pad also can be rinsed with water, easy to clean and reusable, please dry the water after each use. 【Application】The hand sanding set is great for furniture, stair railing,wood, paint, metal sinks, kitchen ,plastic or drywall. Flexible to sand edges, contours, grooves, flat surfaces, corners. 【Package Content】8 x Sanding Blocks. 220 /100 Grits (Grade 800 to 1000/Grade 240 to 320 ). Size: 2-3/4” x 4” x 1” / 70 x 100 x 25mm., Weight: 0.1543235834 Pounds, Manufacturer: Eyerayo