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Brunswick C (System)4.5 
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C (System)4.5 Specs

Product ID 8504 Brand Brunswick
Perfect Scale 211.8 RG 2.55
Finish Polished Lane Condition Medium-Heavy
Coverstock Reactive Resin Ball Mfg Part # 60-105254-93X
Ball Quality First Quality Factory Finish 500 Siaair Micro Pad and Rough Buff Finish
Breakpoint Shape 95 Coverstock Name CFT 4.5
Core Name I - Block Symmetric Core Differential .053
Core Type Symmetric Performance Pro Performance[10]
Brunswick Product Line Pro Performance Drilling Layouts 30728,30729,30730,30731,30732,30733,30734

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CFT v4.5 Coverstock
CFT v4.5 is the next progression in Chemical Friction Technology. The CFT v4.5 coverstock has a lower friction factor than CFT 3.5 which improves length through the heads and mid-lane without
sacrificing the quick response and improved traction on the back-end.
I-Block Symmetric Core
The new I-Block Symmetric core was created by modifying the original asymmetric I-Block core (which has a symmetric base and an asymmetric flip block) to have an asymmetric base. By creating an asymmetric base with an asymmetric flip block on perpendicular axes the two asymmetries cancel each other out making the core shape symmetric. The core shape was also thinned and stretched to increase the RG min while maintaining the overall differential.
Ball Motion
With its Rough Buff finish, the C•(System) v4.5 will offer a lower friction factor with similar response time to friction alternative to the C•(System) 3.5. The new C•(System) v4.5 is best used on medium to oily lane conditions when you need to use a breakpoint further down the lane with a quick response motion to increase pin carry.
Reaction Setup
The C•(System) v4.5 can be drilled using the standard drilling techniques developed for symmetric bowling balls.
Lightweight Engineering
The unique core shape of each Brunswick ball is used for weights from 14 to 16 pounds. This approach to lightweight ball engineering provides bowlers with consistent ball reaction characteristics across this weight range. The same drilling instructions can be used for 12- and 13-pound balls. This is because Brunswick uses a generic core shape with an RG differential that is close enough to the 14-16 pound shape.

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