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_2071644_1 (flange_width__mm_ VARCHAR, cross_section_area__cm_2__ VARCHAR)

### Question ###
What is the flange width (mm) for cross section area (cm 2) 16.4?

### Accurate SQL ###

SELECT COUNT(flange_width__mm_) FROM table_2071644_1 WHERE cross_section_area__cm_2__ = "16.4"