Specifications: Ideal for sanding and polishing wood, rubber, leather, plastic, stone, glass, and other materials. Widely used in the grinding and polishing of metal and non-metallic materials of various complex surface rust. 40-60 grain are used for coarse sanding of rough surfaces, 80-120 grain are suitable for surface smoothing and sanding of small roughness, 180-320 grain are good for final fine sanding. Uses: derusting and polishing ships, metallurgy, furniture, stainless steel, automobiles and other manufacturing industries. Item Name: Sandpaper Quantity: 50/100Pcs Material: Alumina Grit: 40#, 60#, 80#, 100#, 120#, 150#, 180#, 240#, 320# (Optional) Application: Hardware/Electronics/Automobile/Mobile Phone/Glass/Furniture/Ceramic/Ship Features: Durable, Wear Resistant, Multi-purpose Size: 140mm x 90mm/5.91" x 3.54" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 50/100 x Sandpaper