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
GBV 12.7
Core
Low differential Y Core
Symmetric
Factory finish
Not listed
Color
Purple / Green / Black
Released
Not listed
USBC
Approved 2007-06-01
Weights and specs
Weight
RG
Differential
Int. diff
10 lb
2.72
0.031
—
11 lb
2.62
0.032
—
12 lb
2.62
0.046
—
13 lb
2.59
0.043
—
14 lb
2.53
0.058
—
15 lb
2.52
0.054
—
16 lb
2.51
0.049
—
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.
