Those goose necks suck major ***. I had one in my truck. screen always moved, even on nice smooth roads. Damn thing weighs more than a 7" screen, and is a ***** to flex. Once you get it shaped, there is so much slop in it, that just looking at it made the screen move. Not to mention the issues when trying to use the touch screen.
My advice: do not buy. Also, you can buy that same part from a different seller for 28.00
good luck, there are better mounting solutions available.
Side note: is this cleverly disguised spam???