GAMBLER ZERO BLUE DIAMOND SPONGE
Gambler Zero is a mechanical spin type rubber, generating spin exclusively via grip. Zero's non-tacky surface is ideal for away table play or flat hitting (just like Japan or Euro rubber). Blue Diamond is a mid-hard sponge rather than a soft.
I switched from Burst Thors Hammer to this Zero Blue Diamond. I liked Burst TH, but it was too powerful for my level (1250 rating). Zero BD is definitely slower with more control. Good in short and mid game. Far from table, you will notice lack of power. This is my unscientific test results: Ball dropped from 12 inches, Burst TH bounces 8+ inches, Zero BD bounces 7 inches. This is on Gambler Zen blade. Recommend this rubber for those looking for control and pairing with flexible blade.