Opteka X-CAGE Video Stabilization Rig for Digital SLR Cameras with Expandable 15mm Rails Provides stability to DSLR video shoots Offers mounting space for a number of accessories Heavy-duty aluminum construction Quick-release camera plate - height of the plate is adjustable Includes four (4) 105x15mm dual threaded rails, two (2) 77x15mm male-threaded rails & two (2) 90Deg rail connectors