Callaway Tour is Golf Balls 1 Dozen Personalized Utilizing second generation Dual Core Technology, this ball produces maximum greenside spin on short iron shots while activating the inner core on drives to produce Tour level distance with low spin. The soft Hyper Urethane cover helps create even more wedge spin to feel and play softer than any other Tour caliber ball Callaway has ever designed. HEX Aerodynamics reduces drag with 100% surface area coverage for stable, efficient ball flight in various weather conditions. f player, src videosflowplayerflowplayer.commercial 3.1.5.swf, cachebusting true, key '450d1f2cfdf440be091', clip url httpwww.intheholegolf.comvideoscallaway tour is golf ballscallaway tour is golf balls.flv, autoPlay false, autoBuffering true Dual Core construction produces spin optimization the difference between high short game spin and low driver spin crucial for optimum performance. Featured in Tour i Series balls, Dual Core technology uses two cores with different compressions in one ball so golfers can keep driver spin low while still producing short iron spin. Specifications Callaway Tour is Golf Balls Construction 4 Piece Ball Size 1.684 Ball Target Weight 45.6 Core Material Polybutadiene Core Diameter 0.940 Outer Core Material Polybutadiene Boundary Layer Material Dupont HPF Boundary Layer Thickness 0.064 Cover Material Thermoset Urethane Cover Material Thickness 0.020 Cover Material Hardness 49D Surface Area Coverage 100% Aerodynamic Pattern HEX Aerodynamics Number of Geometries 332