Box Three & Four Derailleur B-Screw with Plastic Insert - Box®

Box Three & Four Derailleur B-Screw with Plastic Insert

$6.00 Sale Save

Only 9 left in stock

SKUSP10-BX3/4-BSCREWINSERT

Replacement b-screw kit for early model Box Three and Four rear Derailleurs.

Includes:
(1) B-screw
(1) Plastic expansion insert

Box three serial numbers 20390000 and lower
Box Four serial numbers 20380000 and lower