These fan inlets are molded fiberglass, they fit our 24" or 34" fans. The larger 34" has carbon fiber reinforcements.
Shipping cost will need to include a box charge of $18.00, for 24" box, $35 for 34". UPS charge for a 24" is about $95. To save money on shipping buy the lift fan at the same time. I’ll credit any overage as the estore doesn’t “know “ how to pack boxes.