Galaxy's Mercury II rubber is the first rubber of the MOXA sponge line, Galaxy entry level version of the "MAX TENSE" line. The Mercury II rubber is tacky, softer topsheet that provides a strong spin on serves and pushes, while given more control to loops, blocks, and drives.
This rubber is great for players learning the fundamentals of table tennis. For beginners or players used to using European/Japanese products, use the 33 or 37 degree version. For players with stronger fundimentals or used to Chinese products, use the 37 or 41 degree version.
As compaired to the previous Mercury rubber, the new Mercury II is softer, lighter, and provides a more 'springy' sponge. Overall speed feels the same.