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Ebonite Warning Sign

Photo and specs courtesy of bowling.com. Reproduced with credit to the maker.

How it moves

Foul lineArrows · 15 ft43 ft · board 3.56.1° entry
Hockey-stick turn (asymmetric core). Dotted is skid, then the turn, then the roll into the pocket. Estimated from the coverstock, finish, core, and differential for a right-handed bowler with medium revs on a house shot. Lane conditions, speed, and layout move all of this.
Ebonite

Warning Sign

Discontinued
Hook potential8.5 (est.)8.5 of 10, estimated

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
High Traction Hybrid-2
Reactive hybrid
Core
Vital
Asymmetric
Factory finish
Matte
Color
Not listed
Released
2011-11-22
USBC
Approved 2011-10-01

Weights and specs

WeightRGDifferentialInt. diff
14 lb2.470.0580.018
15 lb2.480.0550.018
16 lb2.490.0520.018

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
Matte. Bites through heavy oil, so the ball reads the lane early and hooks sooner. Sanded balls (500 to 1000 grit) live here. Surface changes over games, and a pro shop can take any ball either way with a pad.

Balls like this

Same coverstock and core type; the closest company for this ball in a bag.