What is Length, when Barrel Length is 750mm / 29.5 in?
CREATE TABLE table_name_46 (
    length VARCHAR,
    barrel_length VARCHAR
)
SELECT length FROM table_name_46 WHERE barrel_length = "750mm / 29.5 in"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is Length, when Barrel Length is 750mm / 29.5 in? ### Input: CREATE TABLE table_name_46 (
    length VARCHAR,
    barrel_length VARCHAR
) ### Response: SELECT length FROM table_name_46 WHERE barrel_length = "750mm / 29.5 in"