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by NIST/Science Source
$17.00
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The Center for Disease Control has recommended the use of cloth face masks to help fight the spread of COVID-19.
This face mask is made from 100% polyester and includes two ear loops with adjustable grommets for a comfortable fit.
The printed area of the mask is approximately 7" wide by 5" tall. This mask fits well on adult mens' faces without the grommets but, due to the adjustable grommets, can be worn snuggly by adult women, as well.
Please note - this is NOT a surgical grade mask. It is not intended for any medical or commercial uses, whatsoever. It is a simple, cloth mask designed for everyday use to cover your mouth when out in public. The mask should not be used in any medical or surgical setting.
We make no warranties that the mask prevents infections or the transmission of viruses or diseases.
Design Details
After the Treaty of the Meter was signed in 1875, the International Bureau of Weights and Measures (BIPM) in Sevres, France, procured 43 prototype... more
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After the Treaty of the Meter was signed in 1875, the International Bureau of Weights and Measures (BIPM) in Sevres, France, procured 43 prototype kilograms of platinum-iridium in the form of right circular cylinders of equal diameter and height (approximately 39mm) with slightly rounded edges. One of the set, having essentially the same mass as the Kilogramme des Archives, was selected as the International Prototype Kilogram, and is now maintained at BIPM. National Prototype Kilograms No. 20 and No. 4 were received by the United States from BIPM in 1890. Benjamin A. Gould, U.S. Delegate to the International Conference of Weights and Measures, supervised the packing of Prototype Kilogram K20 on October 27, 1889 for its transport to the United States in care of George Davidson of the U.S. Coast and Geodetic Survey. On January 2, 1890, U.S. President Benjamin Harrison broke the seals on the case and gave the standard to Thomas C. Mendenhall, U.S. Superintendent of Weights and Measures. I...
$17.00
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