This is a beef esophagus (gullet) that has been stuffed with a mixture of ground beef esophagus and wheat flour, with a stretched beef bladder wrapped around. It looks kind of like a bully stick but it's a much softer treat.
This is a full beef tail around 12" inches in length, though there will be some variation in length and thickness. This tail does contain tiny boney vertebrae. This chew has a tough texture on the outside and crunchy texture on the inside.