Premo Plastic Sphere Dispenser | SEI Industries LTD.
File:Bar-complex sphere-dispenser.jpeg - Wikipedia
Aerial Ignitions - Cuervito Fire | Video of helicopter dispensing plastic spheres for back burn operation on the Cuervito Fire. These plastic spheres contain potassium permanganate and are... | By U.S. Forest
Wildland Fire: What is a Prescribed Fire? (U.S. National Park Service)