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_name_18 (no_s_ VARCHAR, height_in_ft VARCHAR)

### Question ###
Tell me the number for height in ft of 6-7

### Accurate SQL ###

SELECT no_s_ FROM table_name_18 WHERE height_in_ft = "6-7"