CENTAUR GREEN/BLUE By combining a modified version of our DC core, a new fully adjustable reactive coverstock, and a price that's easy on the wallet, we have created a ball that is a must have for league bowlers. The Green/Blue CENTAUR was designed to easily get through the heads, start revving up in the midlane, and make a strong but controllable and predictable backend move. Finish: 1000 Matte (Gray Pad) Hardness: 75-77 RG: Med (2.61") Flare: Low (.015" differential) Length (1-100): 66 Back end (1-100): 81 Hook (1-100): 67 (oil) - 81 (dry) Avail. Wts: 13-16# (Centaur core) 10-12# (on request - light wt. core) Lane Conditions: Medium to Light Conditions