Noga MG1106 Jumbo arm. 3/8-16 and 1/4-20 threads. Used, but in great condition. Holds strong, clean threads. More info here: http://www.holditarm.com/Products.php?prdID=MG1106
Price $105 shipped anywhere in the US, or local pickup in LA.
Price $105 shipped anywhere in the US, or local pickup in LA.