>>309
違うラバーの情報みてもしょうがないだろ
official siteにかいてあったし
https://www.donic.com/donic/en/rubbers/3486/donic-bluestorm-z1-turbo?c=33

A comprehensively thinner top surface rubber, subjected to high tension, allows space for a thicker sponge - generating extra power and speed.
The DONIC Bluestorm Series offers noticeably greater acceleration whilst retaining its outstanding spin and speed characteristics, making the latest trend.
The thinnest sponge is 1.9 mm, middle sponge thickness is 2.1 mm - and the thickest variation is called max+, because this sponge is even thicker than previous max versions.