Wilson Steam 99S Tennis Racquet Featuring Wilsons Spin Effect Technology, the Steam 99S has an ultra open 16 x15 string pattern which is a first in tennis! Compared to a normal 16x20 string pattern, this open pattern allows for the main strings to slide and snap back providing super enhanced spin potential. Headsize: 99 square inches / 638 sq. cm Length: 27 inches / 68.58 cm Weight (unstrung): 10.9 oz / 308 grams Weight (strung): 11.4 oz / 323 grams String Pattern: 16 Mains x 15 Crosses. Racquet is strung and ready to use. Does not include a cover.