The BG 66 Ultimax will definitely help players withstand tournament pressure. It gives the perfect balance for top speed, durability and control and that is much better than other standard strings. Recommended by leading players, Durable & Powerful: it consists of high-intensity nylon core with a string base that produces a 30% greater durability than your average string could ever deliver. Equipped with nylon and high-polymer nylon on the outer realms, the BG 66 will adequately deliver a beautiful shot. It delivers a powerful spin by keeping the tension of the string on the lower recommended range side of the racquet. Noted for its high resilience it generates smashing speeds of up to 0.65 mm gauge.