3M Microfinishing Film Roll 372L, 40 Mic 5MIL, 0.669 in x 900 ft x 1-5/8 inGeneral Information Brand 3M Bond Type Resin Core Type Coreless 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. 625 in Core Size (Metric) 41. 275 mm Micron Grade 40 m Overall Length (Imperial) 900 ft Overall Length (Metric) 274. 25 m Overall Width (Imperial) 0. 669 in Overall Width (Metric) 17 mm Grit Non Pertinent Volume