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In addition it should be mentioned that the material gauge which by the way always is measurement of a single layer of material is in general referred to in 4 categories: Economy weight, Standard Weight, Heavy Weight and Super Heavy Weight . Sometimes Economy weight is also referred to as light weight sheet protectors.
For more technical information on material weight click:
Polypropylene Material Gauge
*NOTE: Other sheet protectors are also available for bulk purchase at our
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