Hammer is calling to what it is, a legend. The Black Widow Legend takes the proven history of the Black Widow line and takes it up a notch. This is the first ball in this line to use a hybrid coverstock. This ball is aggressive with it's polished cover and then combine it with popular Gas Mask core to provide awesome movement on the backend that carries through the pins. Color: Black/Red Pearl Reaction: Strong to mid-lane with massive backend Coverstock: NBT Hybrid Core Type: Gas Mask (includes Flex-Resin additive, Ceramix surface process, and Carbon-Fiber outer core) Factory Finish: 500, 500, 500, 1000 Abralon with Power House Factory Finish at 300 RPM Speed Radius of Gyration (RG): 2.50 Differential (Diff): .058 RG and Diff are based off of 15 lb. balls Hook Potential: High Length: Medium Recommended Lane Condition: Medium-Heavy Oil 3 year manufacturer's warranty