How much the ball wants to hook, 1 (straight, a spare ball) to 10 (the strongest oil-eaters). The maker publishes no number for this ball, so this is estimated from the coverstock, core, finish, and differential.
Coverstock
GB 10.7
Core
Centrex Symmetrical Mass Bias
Factory finish
Not listed
Color
Purple / Teal / Navy Blue
Released
Not listed
USBC
Approved 2005-08-01
Weights and specs
Weight
RG
Differential
Int. diff
14 lb
2.49
0.053
—
15 lb
2.46
0.056
—
16 lb
2.47
0.050
—
Surface
Coarse grit
Coarse and fine
Fine grit or polish
Coarse surfaces grip through oil and hook early; fine or polished surfaces skid longer and hook later. Surface changes over games, and a pro shop can take any ball either way with a pad.
