Super Big Bertha Upscale Fins and Centering Rings
- Custom work subject to requirements review; typically ships within 3 business days
These plywood through-the-wall fins and centering rings are upscale versions of the original Estes Big Bertha. Fin thickness ranges from 1/8 inch birch plywood for the BT-70 and 80 versions, to 1/4 inch birch plywood for the 3 and 4 inch versions, and 3/8 inch thick birch plywood for the 5.5 inch version. More details on specifications like fin tab length forthcoming as we move this product into production.