tennis racket
Racket with an oval head that is used to strike the ball; its maximum length is 29 in.
stringing 
Synthetic or natural cords strung together to form a surface used to strike the ball.
butt 
Enlarged end of the shaft that prevents the hand from slipping off the handle.
tennis ball 
Rubber ball that weighs about 2 oz and is filled with compressed air; it is covered with felt to make it more adherent.