Using cloth as the matrix, the service life is more than 2 times longer than that of red sanding discs using paper as the matrix. The flannelette is used reliably, and the thickened and lengthened high-grade hook and loop provides a firm connection with the sander, ensuring the sandpaper will not separate during use with a random orbital sander. Diamond anti-blocking heat dissipation design, 5-inch 8-hole assortment hook and loop random orbit sandpaper. The blue zirconia grit is commercial grade, reducing the need for frequent replacement of sanding discs. Quantity per box: 70-pack. With special processing, the cloth base will not tear and the abrasive will not fall off. The grinding effect may be slightly rougher compared to red sanding discs (as red sanding discs often change from 240 grit to 800 grit after a few minutes of use). Can be used with water (not for soaking). Universal design, compatible with orbital sanders for polishing wood, metal, furniture, fences, stone, bamboo, walls, and other surfaces. Suitable for a wide range of materials. Size: approximately 125mm Material: Aluminum Oxide Color: Blue Package Contents: 70 x Sanding Discs Only the above package content is included; other items are not part of this product. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3cm.