... .Shockproof, durable use 4.TAIWAN class B woolen cloth surface Tennis ball FT-30 Material: TAIWAN class B woolen cloth surface and ... of types of high, medium and low-grade tennis rackets, badminton rackets, and tennis, shuttlecocks; every kind of high, medium stringing ... and high quality, the products have won the awards of tennis and badminton association and appointed as special products used by ...