So I've been looking at cgraunke's Instagram photos and it made me think about trying the pipe again. I've had this one for 5-6 years and only used it one time. When I took it apart tonight the little metal thing in the photo was just siting on the pipe. I guess my questions are what is it? Do I need it? Should it just sit in the pipe between the bowl and mouth piece? Thanks for any help. Not sure if it's even a pipe that's worth keeping.