Length with strong backend reaction. Best on light to medium lane paterns. GB 10. 7 Coverstock. 4000 Abralon and polished with Powerhouse Factory Finish Ball Polish. Cyclone Core. 16# RG 2. 53 Diff 0. 047. 15# RG 2. 53 Diff 0. 053. 14# RG 2. 54 Diff 0. 053.