Mega-Block is an antispin rubber created with spin reversal in mind. This rubber allows for extreme levels of spin reversal. The sponge is slow allowing for great control and placement on your strokes. Dead balls and pop ups can be attacked well. The thinner your sponge, the higher the reversal. The thicker your sponge, the slower and more controllable it will be. IMPORTANT- Glue all Der Materialspezialist antispin rubbers with the glue sheet (should be ordered separately) using the instructions provided. If instructions are not followed, refund claims for damaged antispin rubbers will not be honored.