Flamebreak 430 Exterior Glue FD30
Manufactured with full 4mm hardwood plywood faced bonded to a 3-layer hardwood lumber core with hardwood framing.  Approximate weight of 30-31kg per 2135 x 915 blank compared with 40-60kg from most other blanks.
 

Flamebreak FF630 MDF Faced FD30
Manufactured with 6mm MDF faced bonded to a 3-layer hardwood lumber core with hardwood framing.  Approximate weight for size 2135 x 915 is 40kg per blank.
 

Flamebreak 660 Exterior Glue FD60
Manufactured with 6mm hardwood plywood faces bonded to a 3 layer hardwood lumber core with hardwood framing.  Approximate weight of 45kg per 2135 x 915 blank compared with 70-100kg from most other blanks.
 

Flamebreak 660 MDF Faced FD60

Manufactured with MDF faces bonded to a 3 layer hardwood lumber core with hardwood framing.  Approximate weight of 48kg per 2135 x 915 blank compared with 70-100kg from most other blanks.