Tuttle - President G20 is a brand new tacky rubber with a softer, rippled surface layer. This gives an exceptional grip and enables a varied topspin game with both brush loops and hard topspin shots. Sponge thickness: 2.2mm. Sponge hardness: 38°.
Speed (Tuttle): 100/140
Control (Tuttle): 105/140
Spin (Tuttle): 120/140
Tackiness (Tuttle): 135/140
Reviews: https://revspin.net/rubber/tuttle-president-g20.html
https://equipment.ittf.com/#/equipment_preview/racket_coverings/3054