E PAPER BACKING: The thickened E paper backing distinguishes sanding sheet from others in the market; it will not tear or wearout during workHOOK & LOOP DESIGN: The hook and loop design allows for quick fitting; with durable the Nylon Buckle back, you will have no in your work done quickly and nicelyHIGH QUALITY MATERIAL: the grains are made from calcines abrasive durable aluminum oxide grain, making that the most suitable grains are matched with grits of different grades DURABILITY: the high-strength resin bond system increases the service life of sandpaper packs; the strength test of flannel tensile is over the standard value 1.47NColor: RedShape: SquareSize: 93 x 186mmGrit: 40# 60# 80# 120#Backing: E paper backingNumber of Holes: 8 HolesAbrasive Grain: Aluminum OxideBacking Technique: Hook and LoopSpecifications Tolerance: +/- 1 mmNotes: This sandpaper is for dry sanding, do not use it for wet sanding. the sandpaper packs in dry and ventilated . Humidity will harm service life.Package Contents:25* sandpaperOnly the above package content, other products are not included.Note: Light 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.