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Hammer Effect Purple Pearl Urethane

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

How it moves

Foul lineArrows · 15 ft38 ft · board 102.4° 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.
Hammer

Effect Purple Pearl Urethane

Overseas only
Hook potential4 (est.)4 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
Urethane Pearl
Urethane
Core
Huntsman
Asymmetric
Factory finish
500/1000/2000 Siaair Micro Pad
Color
Not listed
Released
2025-09-18
Sold
Overseas only
USBC
Approved 2025-09-02

Weights and specs

WeightRGDifferentialInt. diff
12 lb2.590.0410.014
13 lb2.600.0410.014
14 lb2.500.0500.016
15 lb2.470.0500.017
16 lb2.480.0430.015

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
500/1000/2000 Siaair Micro Pad. Sanded then smoothed (1500 to 3000 grit): enough tooth for oil, enough gloss to get down the lane. Most box finishes. 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.