Zacuto Zamerican V3 Medium Arm has been discontinued, here are some related products you might like:
The Zamerican V3 Medium 9 inch articulating arm is an articulating arm for accessories. This arm works with Zacuto kits to offer adjustable equipment installation on camera. It is 20% lighter than Zacuto's first articulating arm and is made with chrome balls for silk movement, aluminum ends for rust reduction and stainless steel to increase strength and reduce bulk.
It is built with Z-Release, giving you built-in quick release action using Zacuto's new Z-lock technology. Accessories install and remove with the flip of a lever. No more screwing and un-screwing and no more coming loose. Zamerican arms can be extended using Zacuto male rod extensions making articulating arms any length you want them to be. Zamerican arms require a Z-Release (quick-release) mount on each end of the arm.
More information about Zacuto Products (Link to Zacuto Website)