The U.S. Trade Representative announced that some medical device products will be exempt from the administration’s 25 percent Chinese trade tariffs.

The tariffs were applied a year ago to $34 billion worth of Chinese products including certain devices such as imaging systems and their components.

Devices that are now exempt from the tariffs include dental X-ray alignment and positioning apparatuses, multi-leaf collimators of radiotherapy systems, veterinary ultrasound devices and certain components of electrosurgical instruments.