These are sold in a set of two, one left-hand and one right-hand.
For black use 390711
This item ships for free within the US. if you are in another country, please contact us at 574-264-2505 in order to obtain a shipping quote.
Mechanism - Base Roller - 1/2" Wear Bar - Replacement
Mechanism - Base Roller - 3/4" Wear Bar - Replacement