3M Diamond Lapping Film 661X, 6.0 Micron Roll, 0.25 in x 150 ft x 3 inASOGeneral Information Brand 3M Attachment Type Plain Back Product Series 661X Country Of Origin United States Sold As Case California Residents Proposition 65 Warning Dimensions and Specifications Backing Thickness (Imperial) 3 mil Backing Thickness (Metric) 0. 076 mm Micron Grade 6 m Overall Length (Imperial) 150 ft Overall Length (Metric) 45. 72 m Overall Width (Imperial) 0. 25 in Overall Width (Metric) 6. 35 mm Width 14. 4 in 36. 58 cm Height 5 in