Small amount of processed reactor byproduct. Sealed in original packaging. About the size of a shoebox. Mild warmth is normal.
Leftover from when we switched from Thermalon pellets to the new Quarnbey coils. Just sitting in the utility closet and my wife says it makes the towels smell like ozone. She's right, it does.
You haul. Don't open the packaging. Technically it's fine if you open the packaging but then you have to file with the county and honestly it's not worth it.