Features:The main material of tennis racket is metal and they have a protective ball line concave air tube and good intensity and durability.This adult tennis rackets big surface area and light weight make it easy to use while playing which brings a good user experience.Specifications:Tennis rackets material: mainly metalTennis rackets color: blue redTennis rackets size: about 21 inches in length about 105 square inches in head sizeTennis rackets weight: about 0.57 lb/ 9.2 ozPackage includes:4 x Tennis rackets2 x Tennis balls2 x Carry bagsNotes:Manual measurement please allow slight errors on size.The color may exist a slight difference due to different screen displays.