Transformer is a highly disruptive antispin rubber that has long inverted pips and a slow dampening sponge. This combination allows for high levels of control and speed reduction. The thicker the sponge, the slower it is. 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.