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_18509 ( "Channel" real, "Center Frequency" text, "Frequency delta" text, "Channel Width" text, "Overlaps Channels" text )

### Question ###
what is the channel width that overlaps channels 1,3-6?

### Accurate SQL ###

SELECT "Channel Width" FROM table_18509 WHERE "Overlaps Channels" = '1,3-6'