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- Johns Manville Formaldehyde-free™ fiber glass insulation
 - GREENGUARD® certified insulated products
 - Galvanized or bronze metal core reinforcing
 - Oversized core to fit on collars and register boxes
 - Weather-resistant packaging
 
- Diameter16 inLength25 ftMaterialFiberglassManufacturerQuietflex ManufacturingManufacturer #1680Series80 SeriesTemperature Rating200 degFTypeRip StopVapor TransmissionAt or Below 0.05 perms
 
