Wilson Staff Model golf balls are tour caliber for maximum control. Four-piece urethane golf ball that delivers unmatched precision speed and consistency. V-Core Advanced performance - core composition generates maximum velocity off the club face. 3SIX2 Seamless Urethane Cover - provides maximum spin for more stopping power. Medium Compression Core - with velocity-boosting additive helps achieve fast ball speed on tee shots. Compression: 94. Dimple: 362. Layers: 4. Comes in a set of 12.