The Missing Link comes in four eye catching colors that gives bowler's unmatched performance at a low price. We increased the strength of shell to S40 and increased the dynamics of the L shaped core, by enlarging it and adding a dense extension arm. This produces a higher RG Differential of 0.045 (in all weights but 10 lb).900 Global - providing innovative core design with proven shell technology at a great value.Attributes Tech Specs Coverstock: S40 Color: Black/Red Solid: 2,000 sanded Blackberry/Silver, Purple/Blue & Blue/White: PolishedCore Type: Asymmetric