1) length:6.0mm,8.0mm,12mm,16mm,20mm 2)good alkali resistance ... . StorageUnless otherwise specified, fiberglass products should be stored in a dry, cool and rain-proof area. It is recommended that the ... at 15-35,35%-65% respectively AR-glass chopped strands (6.0mm,8.0mm,12mm,16mm,20mm)