TSP 730 21 sponge (Rose pink color with sponge hardness of 40) is lighter weight than the other 730 sponges. This new sponge is very specialized, and provides powerful topspin as well as defensive spins with the 40mm ball. The unique stickiness of the 730 top sheet is powerful weapon when used with the 40mm ball for serving and allround play.

TSP 730-21 730-21 is a combination of a sticky chinese surface and the japanese TSP-21 offensive sponge. The result is an offensive rubber, which can produce maximum spin and high speed.