Stars and Strikes Forever! The Spirit by Columbia 300 will provide outstanding hook and performance at an incredible value. This is due, in large part, to Columbia and BASF working together to produce an inexpensive yet high-performing coverstock, exclusively for the Spirit cause. The core has an Rg of 2.59 (15lb.) and will create 3-5 inches of track flare. The Spirit is factory polished with a hook rating of 16; however, it can be sanded to greatly increase hook potential. The Spirit is sure to provide striking results on most common lane conditions, AND ALL FOR A GREAT CAUSE!!