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_name_90 (barrel_length VARCHAR, barrel_twist VARCHAR)
### Question:
Name the barrel length for barrel twist of 1:7
### Answer:
SELECT barrel_length FROM table_name_90 WHERE barrel_twist = "1:7"