Buy on Amazon : http://www.amazon.com/gp/product/B00HTWFD2W?tag=scratchandsti-20
Movo Photo CTS500 Panaramic 180-degree Circular Sliding Track with Roller Bearing Sliding Platform
51 Circular Track 12 circle
Smooth Slides with Rigs up to 20 LBS
Solid Aluminum Construction
Works with 14 or 38 Threads
Includes Roller Bearing Platform Adjustable Legs Stoppers Carrying Case