729 "High Tension" inverted rubber has tension built in to the sponge and top-sheet. This help reduce the amount of energy lost at the point of impact. In essence, it turns the speed of your opponent's shot into additional power for you.
Great rubber for loop drive/Quick attacking.
Speed: 100 Spin: 120 Control: 120 Sponge: Medium Soft
The 729 higher is more of a recreational rubber than a rubber for the serious table tennis player, but it will definitely work for some people, especially if you are on a budget limit. It is pretty cheap, i have seen then sold pretty much under 10 dollars, it is a pretty decent rubber, but do not expect anything out of it like sriver, magna, hammond, mark v, etc. and other better offensive rubbers. Actually a lot of blockers seem to use this rubber, because it is kind of a offensive rubber, except with kind of a dead sponge, so it is great for blocking placed tricky shots. It is pretty hard to loop good loops with it though.