Golf Ball -4PC Metal-

Descriptions "The World's First 2+2 Metal system" The World's first 4 layers of metal ball for professional golfers 2Cover + 2core structure Bismuth mixed dual core Patented in Korea/179447,USA/5879244,JAPAN/3132552 Zirconium Cover Patented in Korea/281227,USA/6242521,JAPAN/3012883 432 Octahedron Patented in Korea/118673,USA/5564708 The VOLVIK 4 PIECE METAL is the world's first 2 cover & 2 core golf ball to contain bismuth ( Bi #83 ). Bismuth's unique character causes its volume expand by 3 - 3.5% while solidifying and the organic polymeric materials grow dense as much as bismuth expands, that create a lot of energy which can remarkably extend the flight distance of the ball. ITEM       VOLVIK 4PIECE METAL StrUCTURE       4 PIECE    PATENT : 5184828 DIAMETER       42.7 mm WEIGHT       45.5 gr OUTER COVER       ZIRCONIUM IONOMER(Shore D:54)    PATENT : 6242521 INNER COVER       POLYURETHANE RESIN(Shore D:40)    PATENT : 134652 METAL       BISMUTH (#83)    PATENT : 5879244 OUTER CORE       SOFT PBR (Shore D:46) INNER CORE       HARD PBR (Shore D:50) DIMPLE PATTERN       CUBE OCTAHEDRON    PATENT : 5564708 NUMBER OF DIMPLES       432 COMPRESSION       85-90 trAJECTORY       MEDIUM