1 Types of Gutters and How to Prepare for an Install. 2  Advice on Gutters and Downspouts. 3  Tips for Cleaning and Repairing Gutters.  Outdoor Spring Maintenance Tips.
One mil is 1/000th of an inch. A sheet of paper is 4/1000ths of an inch thick, so 10 mil has the thickness of 2 1/2 sheets of paper. A mil is not to be confused with a millimeter(mm). On average human hair is 100 microns or .004 inches. 10 mil is the width of about 2 and a half human hairs.
Micron. A unit of measure for the smallest of the small, One Micron is 0.001 mm or 0.00004 inch. A micron is really, really small. The width of a human hair is about 70 microns. Our eyes can see no smaller than 40 microns, and youâll need a decent microscope to see a particle 20 microns wide. Allergens like dust, smoke and bacteria are particulates that are often .3 microns or less. At that size, they can get deep into your lungs, because they arenât filtered well by your nose and throat.