The Head Graphene XT Speed Junior Tennis Racquet features full graphite composition, Graphene XT technology, a beam of 24 mm, head size of 100 in sq., weight (unstrung): 8.8 oz., a balance of 1/3 in HL/320 mm, length of 26 in, and a string pattern of 16/19. Age: 9-11. MFG#: 235005.