New Delhi, November 22: Kerala-based private sector lender CSB Bank will put up 21 million shares for sale from Friday, through an Initial Public Offering (IPO). The private sector lender plans to raise Rs 410 crore through the offer at the upper end of the price band by issuing fresh equity shares and offer for the sale of shares by existing shareholders. The price band for CSB Bank IPO has been fixed at Rs 193-195 per share.