Material: White aluminum oxide, aluminum oxide, silicon carbide ect. Abrasive material: Brown aluminum oxide, white aluminum oxide, silicon carbide(carborundum) R/R Kraft paper Grit: #36, #40, #46, #50, #60, #80, #100, #120, #150, #180, #220, #240, #280, #320, #400, #600 Packing: White paper, kraft paper, or colour paper around.