1. Material: sandpaper2. Scope of use: for jade, agate, jadeite, glaze, mold, electronics, glass, and other surface polishing3. Suggestions: sandpaper stick please use low speed, recommended speed 2000-5000, please do not use super speed4. Tip: 180 mesh sandpaper rod coarsest, polishing efficiency, the larger the number of mesh, the finer the polishing5. Shank diameter: about 3mm6. Weight: about 5gSpecification: Package Weight One Package Weight 0.07kgs / 0.16lb One Package Size 12cm * 8cm * 2cm / 4.72inch * 3.15inch * 0.79inch Qty per Carton 404 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 404 pcs = 71508 pcs40HQ: 412 cartons * 404 pcs = 166448 pcs