Luxilon ALU Power 16L (1.25) Luxilon Big Banger ALU Power 125 is a playable tennis string designed for players who want more durability with amazing power and control. As Luxilon's most popular string, it definitely sets the benchmark for durability strings. This string provides premium durability along with increased control and spin potential. If you're a string breaker, this string is definitely for you. All Big Banger Strings: Give more power. Are very durable. Show no loss of efficiency. Don't move. Are impervious to atmospheric conditions. Durability: 8 Power: 10 Control: 10 Comfort: 9 It is recommended by Luxilon that you string Big Banger strings at least with 10% less tension than your usual strings.