Those are made by Indeck Energy out of Wisconsin. They are a heating pellet manufacturer who decided to get into BBQ pellets recently. I've actually used their Premium Hardwood heating pellets in my smoker before.
It's interesting because I had asked them if I could use their heating pellets in my smoker and they said I could as there are no fillers and they are hardwood. This was prior to them manufacturing the BBQ pellets.
I asked again recently and they told me not to use the heating pellets, then directed me to their Griller's Gold website.
WHAT IS THE RECIPE FOR EACH GRILLER’S GOLD FLAVOR?
We’re glad you asked! Our proprietary wood blends below were created to deliver the perfect balance of flavor to your delicious outdoor cooking.
Competition – Maple, Hickory & Cherry
Fruitwood – Maple, Cherry & Apple
Smokehouse – Oak, Hickory & Mesquite
Hickory – Maple & Hickory
Cherry – Maple & Cherry