Tecnifibre's Fire 300 is the most powerful frame in the Fire range, built for modern, spin-heavy tennis. It has a 645 cm2 (100 sq in) head, a 16x19 string pattern, a 300 g weight, 685 mm length and a 320 mm balance, with a graphite frame. X-DAMP, a steel piece inside an elastomer pocket in the handle, is said to cut harmful vibration by 36 percent. It is supplied unstrung.