Bridgestone Tour B330 RX Golf Balls The New Tour B330 Series maximizes Tour Caliber Performance for highly skilled players with varying swing speeds. Optimized for AMATEUR AVERAGE lt 105 MPH Swing Speeds Features SOFTEST multi layer Urethane Ball on the market Large SOFT Gradational Core with a soft feel and added forgiveness Mantle layer for high repulsion and workability SOFT Urethane Cover with Seamless 330 dimple design for pinpoint accuracy