Nittaku Factive The top sheet has special materials that enable strong power, with inward pimples shaped to provide a good "bite" feeling . This combination with a mid-hard sponge allows you to play with versatile styles. Speed 14,75 Spin 11.75 Hardness - 35 grade Violet strong sponge Greutate - 61 grame - patrata grosime 2.0