This set includes four (4) BLU-27A/B 750lb Napalm canisters with rounded nose and tail fairings. 

3D printed in two pieces (with separate MS3314 suspension lugs), these are almost ready to use right out of the package. Some light sanding to remove the remnants of the print supports will be required on the aft end of the main body, and you'll need to remove the small pins on the fairings and sand smooth. 

These were used extensively during the Vietnam War.