The Hot Rodâ„¢ HYBRID from STORMâ„¢ features Storm Bowling's first Reactorâ„¢ hybrid (half pearl - half solid) reactive coverstock. This is a great ball for playing down and in and is very forgiving on a house shot. The new Reactorâ„¢ coverstock is polished to 1500-grit and is noticeably softer and more versatile than any other. The Hybrid core design is the same used in the Hot Rodâ„¢ Pro Stock and Pro Stock Pearl: Multi- Density with Power Mass Technologyâ„¢. The core is symmetrical and really gives you a very predictable roll. This combination is a perfect match of coverstock and core! Get a jump on the competition and then bury 'em!