Used 2011 Columbia Encounter - 15 pounds drilled, color: Navy/Purple/Ocean pro performance bowling ball in good condition. Suitable on medium to heavy lane conditions.  Creates strong mid-lane ball motion. The medium differential along with a high mass bias rating help the Encounter change direction and keep going. The clean and angular Elastin 6.0 cover with a smooth polished finish along with the Encounter core gives you easy length through the front part of the lane and stores up energy for a strong and predictable move down lane . Reactive resin asymmetric. 

USBC1l010466B with side weight hole.  Made in USA.  Wear as shown.