Various Manufacturers Stainless Socket Cap Screw 4 mm x 20 mm

(6 x 16 mm size shown)
$0.75
Details
Use this as your B tension screw on Deore rear derailleur, enabling use of 11 (or 12t)-36t 10 speed cassette!
Part Numbers
MPN | Store SKU |
---|---|
BO3025 | BO4020 |