|Product Name||Crews Cff122 Force Flex Military Ballistic Safety Glasses Black Frame Gray Lens|
|Amazon.com||Buy on Amazon ~ B002FL4ZN0|
|Price New||11.69 US Dollars (curriencies)|
|Price Used||10.64 US Dollars (curriencies)|
|Long Description||MCR Safety received the 2010 New Product of the Year Award at the 2010 National Safety Council Congress and Expo for its ForceFlex protective eyewear. This recognition was presented by Occupational Health & Safety which administers then new product of the year award and honors the outstanding product development achievements of health and safety manufacturers whose products are considered to be particularly noteworthy in their ability to improve workplace safety. MCR Safety's ForceFlex was awarded the new product of the year in the protective eyewear category. ForceFlex protective eyewear incorporates a patented, multi-injection molding of the lens with a flexible Thermo Plastic Urethane (TPU) frame. Due to this construction, they greatly exceed the military MIL-PFR-31013 Standard for ballistic level impact resistance. This achievement benefits consumers by providing unparalleled levels of protection. The TPU material allows the frame to flex and fit individual faces from large to small. The dual material temples combine Thermo Plastic Rubber (TPR) for comfort and polycarbonate for durability. All ForceFlex styles meet military test regimen for high velocity impact protection and exceed ANSI Z87+ standard. This stylish half-frame construction comes with a lifetime warranty.Dual material temples combine Thermo plastic rubber (TPR) for comfort and grip and polycarbonate for durabilityThis patented construction allows for the frame to flex and fit individual faces from large to smallUniversal gel padded nose bridgeMeets military VO test regimen for high velocity impact protectionExceeds ANSI Z87 high impact standards and EN166 standards|
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ISBN stands for International Standard Book Number. Originally this was a 10 digit number known as ISBN-10, but has been replaced with a 13 digit version known as ISBN-13 (aka EAN-13) to better fit in with the industry standard product numbering system.
The ISBN system offers a unique numbering system for books and publications of various types. ISBN offers 9 identification digits for each book or publication and one check digit. ISBN-13 expands the available number set by doubling the available numbers. You might think that the extra three digits would more than double the available numbers but ISBN is limited within the EAN-13 numbering system and will always start with 978 or 979 as the first three digits, leaving only 9 more digits for the actual identification digits and again the last digit is the check digit.
Any ISBN-10 number can be converted to ISBN-13. Any ISBN-13 number that starts with 978 can be converted back to ISBN-10. ISBN-13 numbers that start with 979 cannot be converted to ISBN-10.
The conversion process from ISBN-10 to ISBN-13 is a rather simple one. Start with the first 9 digits of the ISBN-10 number, place 978 in front and calculate the new check digit using the standard EAN check digit calculation.
If you want to calculate the check digit for ISBN-10, that is done using a MOD-11 calculation that is very different than the EAN check digit process.
- Lets start with ISBN-10 number 1-5905-9332-?
- Each digit is multiplied by its position for digits 1-9
- 1x1 + 5x2 + 9x3 + 0x4 + 5x5 + 9x6 + 3x7 + 3x8 + 2x9 = 180
- Now get the remainder 180 mod 11 = 4
- Now return the mod 11 again... 4 mod 11 = 4
- If the results is 10, return the letter X otherwise return the digit.
- For our example, the final number is 1-5905-9332-4
Look at the number above and below the barcode. You will see that except for the last digit in the ISBN number, all of the digits exist in the 13 digit version shown under the barcode right after the 978 and just before the new check digit of 5.
Now you can see how easy it is to convert between ISBN-10 and ISBN-13.