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_2071644_2 (weight__kg_m_ VARCHAR, flange_width__mm_ VARCHAR)
### Question:
How many weights are there when the flange with is 304?
### Answer:
SELECT COUNT(weight__kg_m_) FROM table_2071644_2 WHERE flange_width__mm_ = 304