The Red Alert V Edition maximizes its performance by using Propel X™ Solid reactive coverstock technology. Propel X™ Solid features an enhanced pore structure to provide Xtra consistency from shot to shot and Xtra workability on a wider variety of lane conditions. The Red Alert V Edition uses the popular Zone Classic lowRG asymmetrical core shape system. The core improves the adhesion of the Propel X™ Solid coverstock to the lane, giving the Red Alert V Edition the potential to aggressively respond in the mid and backend of the lane. With its 2000 Siaair Micro Pad finish, the Red Alert V Edition unites the proven Propel X™ Solid coverstock and the Zone Classic Ultra Low RG core to produce a ball motion that clears the front part of the lane and produces a very strong midlane & backend ball motion from the breakpoint through the pins especially for bowlers with lower rev rates. The Red Alert V Edition can be drilled using the standard drilling techniques developed for asymmetric bowling balls. At Brunswick, the unique core shape of each individual 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. At 12 and 13 pounds, Brunswick uses a generic core shape with a RGdifferential that is close enough to the 14 to 16 pound shape so the same drilling instructions can be used.