Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_170097_1 ( pressure_in_hpa__mbar_ VARCHAR, vacuum_range VARCHAR )

### Question ###
What is the pressure in ultra high vacuum?

### Accurate SQL ###

SELECT pressure_in_hpa__mbar_ FROM table_170097_1 WHERE vacuum_range = "Ultra high vacuum"