This type of sponge is a high - end cake inner energy sponge imported from Germany. The thickness of the sponge is 2.2mm, which is rare among cake sponges. It is super soft, with a Shore hardness of 37 degrees. The weight is only about 28 grams, and it is less than 20 grams after cutting. It is light and highly elastic. It is a sponge specially configured for high - end table tennis positive rubber, pips - out rubber and inverted rubber.

Reminder: This product is a single sponge dedicated to table tennis, not rubber.