The TR-320 includes a set of 80cm/31.5" aluminum pipes to construct a 320cm/126" tracking rail. The dolly offers high-performance bearings and a specialized tracking system to prevent derailing. This allows smooth moving shots on either straight or curved rails. With a simple screw-in mechanism, pipes can be easily and firmly assembled, which enables a quick set up. The CR-90 curved rail and the EX-160S straight extension rails are also available, which offers more shooting flexibility.