3M Microfinishing Film Roll 373L, 20 Mic 5MIL, 1/2 in x 150 ft x 1 inGeneral Information Brand 3M 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) 1 in Core Size (Metric) 25. 4 mm Micron Grade 20 m Overall Length (Imperial) 150 ft Overall Length (Metric) 45. 75 m Overall Width (Imperial) 0. 5 in Overall Width (Metric) 12. 7 mm Grit Non Pertinent Volume 28. 24 cubic inch 462. 72