Luxilon Big Banger ALU Power Spin 16L Tennis String takes the best selling ALU Power string and adds a 5-sided cross section for improved spin and added bite on the ball. One of the best options for finesse. All Big Banger Strings Advantage: - Give more power. - Are very durable. - Show no loss of efficiency. - Don't move. - Are impervious to atmospheric conditions. - 5-sided surface for added spin. Luxilon Tennis String WRZ998400