Model: 15 to 19mm Rod Rail System Adapter Clamp
Material: Sturdy Aluminum Alloy CNC Machined.
Special design for Fotga DP500III/DP3000 Quick-release Version Follow Focus.
Allow your follow focus compatible with 19mm film system
The Quick Release Rail Rod Clamp can be easily attached and detached.
Center distance between two mount points(19mm): 104mm
Center distance between two mount points(15mm): 60mm
Width of the inner track is 12mm
length of the mount is 140mm
Note: It fits for the FOTGA quick-release mount version, not for the standard mount version.
And if you bought this for other brand follow focus, pls check the size of the mount and make sure it could be installed.