On the new Evil Siege,
The new C-System 3.5 features “CFT 3.5” the next evolution in Chemical Friction Technology in Purple/Yellow Pearl Reactive 4000-grit micro pad finish. The “CFT 3.5” coverstock has a higher friction factor than the original “CFT 2.5” to improve the overall hook, down lane traction and increase the entry angle. The two-component asymmetrical “I – Block” core generates RG max of 2.585 and RG Differential of .050.
Both balls have a release date of Jan. 25, 2010.
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