3M, 7100043419, Cloth Belt, Narrow, 132 in Belt Length, 3 in Belt Width, P400 Grit, Extra Fine Grade, Cloth Backing, Closed Coat, Brown, Applicable Materials: Aluminum, Brass, Bronze, Carbon Steel, Cobalt, Copper, Hardened Steel, Nickel Alloy, Stainless Steel and Titanium, J-Weight Backing Weight, Dry Wet/Dry Operation