Varian Unique Single Energy Linear Accelerator, C-Series Clinac or Trilogy, versions 7.x and 8.x, Reference/FSCA Identifier: CP-0661; Model Numbers: H14, H18, H27, H29; Product is manufactured and distributed by Varian Medical Systems Inc., Palo Alto, CA || Varian Unique Single Energy Linear Accelerator: The UNIQUE is a Single Energy Linear Accelerator intended to be used for conventional radiotherapy and includes modifications to the previously cleared Varian Trilogy. The UNIQUE provides additional features, safety improvements, and usability improvements. The UNIQUE is intended to provide stereotactic radiosurgery and precision radiotherapy for lesions, tumors and conditions anywhere in the body when radiation treatment is indicated.