CREATE TABLE table_20297668_1 (wraps_per_inch__wpi_ VARCHAR, m_100g VARCHAR)

Name the wraps per inch for 120-240
SELECT wraps_per_inch__wpi_ FROM table_20297668_1 WHERE m_100g = "120-240"
SELECT "wraps_per_inch__wpi_" FROM "table_20297668_1" WHERE "120-240" = "m_100g"