I have a 6" PVC coupler and 8" black PVC I no longer need. I was using them in a burp box to change my tuning and sold the subs. Asking 25 shipped

6" coupler 6" in length and a 6" PVC 8" in length.lengths would be helpful...
What is shown is what I have.Just a 6" PVC or flared ends as well?