BioQuip genus covers are heavy manila tag, basis 125 lb, .0097 caliper, archival,they are calcium carbonate buffered and have a surface pH of 7-8. They are not scored for folding. They are used to file groups of plant specimens affixed to #3135 or #3137 mounting cards. Size is 17 x 24″ (43 x 61 cm), to be folded in half at time of use. Weight is 24 oz. per dozen.
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