3M Polishing Film Roll 971X, 1 Mic 5MIL, 4 in x 75 ft x 3 in, Plastic Core, ASOGeneral Information Brand 3M Bond Type Resin Core Type Plastic Country Of Origin United States Sold As Roll California Residents Proposition 65 Warning Dimensions and Specifications Backing Thickness (Imperial) 5 mil Core Size (Imperial) 3 in Core Size (Metric) 76. 2 mm Micron Grade 1 m Overall Length (Imperial) 75 ft Overall Length (Metric) 22. 86 m Overall Width (Imperial) 4 in Overall Width (Metric) 101. 6 mm Grit Non Pertinent Volume 160. 66 cubic