Calibration Bar R and T Mounts CSC0500-12:
 
Calibration bar mounts for the IA900 tire clamps. Attach mounts to camera system calibration bar (sold separately). A calibration of the frame camera system is recommended every six or when a targeting camera is replaced. 
 
Tire clamp target calibration
Compatible with IA900 tire clamps
Attach to Calibration Bar (bar purchased separately)
Camera system calibration is recommended every six months or after frame-camera replacement