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High Performance Coverstock: Propel Reactive Color: Solid Black / Silver All colors do vary somewhat from the picture shown. Hardness: 75-76 Factory Finish: 1,000 Micro pad Weight Block: MACE Two-component Asymmetrical Core RG max: 2.530 RG int: 2.500 RG min: 2.474 RG diff: 0.056 RG asym: 0.030 Average RG: 2.8 of 10 170 (Scale 10-175)[Read More]

Brunswick Bowling Balls. The deadly Siege is the first in our new series of Pro Performance balls and features the new MACE asymmetrical core as well as the new solid Propel coverstock. This is a strong ball that battles heavy oil and responds quickly to friction for great pin action. CoreM.A.C.E. " Mechanical Asymmetric Core Engineering. The MACE[Read More]

Coverstock: Introducing Recoil coverstock; the next extension in Brunswick coverstock technology. Recoil is an evolutionary coverstock developed by Brunswick to improve the mid-lane and backend traction of the ball on today's slicker oils and lane surfaces. The Recoil coverstock was discovered through testing of new formulation additives and proces[Read More]

Propel Pearl is an evolutionary coverstock developed by Brunswick to improve the mid-lane and backend traction of the ball on today's slicker oils and lane surfaces. The Propel Pearl coverstock was discovered through testing of new formulation additives and process changes in coverstock manufacturing.Mechanical Asymmetric Core Engineering. The MACE[Read More]