3M Microfinishing Film Roll 372L, 15 Mic 5MIL, 0.807 in x 500 ft x 3 inGeneral 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 15 m Overall Length (Imperial) 500 ft Overall Length (Metric) 152. 5 m Overall Width (Imperial) 0. 807 in Overall Width (Metric) 20. 5 mm Grit Non Pertinent Volume 118. 83