Fotga DP500III Quick Release 15mm Rail Rod Clamp

Features:

Special design for Fotga DP500III Follow Focus System allows your follow focus compatible with 15mm film system
Center distance between two mount points: 60mm
Rail diameter: 15mm
Width of the inner track is 12mm
Note: if you bought this for other brand follow focus pls check the size of the 15mm mount and make sure it could be installed