The wedge is used for alignment on specific types of FMC tubing hangers, with this particular design allowing for the alignment of multiple-string tubing hangers without external manipulation methods. Like all FMC tubing heads, the TC-WD-ET is of a straight-bore design, more economical to recondition after abandonment.
If you want to talk to an Instagram customer service representative on the phone, they can be reached toll-free at 1-650-543-4800. Again, though, some people have mentioned that this phone number simply goes to Facebook (Instagram's owner), and they say that they don't do over-the-phone support for Instagram.
You can log in to Instagram using your username and password, so using the email address is not mandatory. However, you can find the email address by using the Forgot Password form. Tap Forgot Password on the login screen on your device and then tap Username or Email and type your username. Tap Send a Password Reset Email to have Instagram send you an email. Browse through your email accounts until you find the email from Instagram.