Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_17918238_1 (length VARCHAR, maximum_diameter VARCHAR)
### Question:
What is the length for a diameter totaling 450 mm?
### Answer:
SELECT length FROM table_17918238_1 WHERE maximum_diameter = "450 mm"