Plug 3, Drill 3. Stored in a plastic bag. I received this from an acquaintance because it didn't suit them, but it doesn't suit me either, so I'm selling it. Used for about 20 games in total. The CRUX series, which has captured the hearts of bowlers with its reliable performance, is back after about a year! It provides sustained roll and soft pin action. Coverstock: Gl-18 Solid Reactive Core: Catalyst Core RG: 2.500 (15lbs) Differential: 0.052 (15lbs) Mass Bias: 0.017 (15lbs)