Airfloa Rail Technology, a supplier to the Indian Railways, is set to open its Rs 91 crore IPO for subscription on September 11. The book-built issue will close on September 15, with listing scheduled for September 18 on the BSE SME platform. The IPO has already generated buzz in the unlisted market, with the grey market premium (GMP) soaring a day ahead of the IPO, suggesting strong listing-day interest. Here are ten key details investors should know: