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F4 101 LOCK-INS (natural)
52mm
53mm
55mm
FORMULA 4
Unbeatable lasting performance SPITFIRE urethane. Fast as hell. Long lasting, abrasion resistance, smooth anti-stick slide with a controllable grip. Guaranteed.
LOCK-IN (SHAPE)
Asymmetrical shape and design. Featuring a conical cut cut profile on one side and a straight edge "lock-in" cut on the other.
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