For use with Shimano Nexus SG-3C41 internal hub gears
This Brake Shoe Unit can also be used on the following internal hub gears:

Shimano Nexus SG-3C41-DX
Shimano Nexus SG-3C40
Shimano Nexus SG-3C40-DX
Shimano SG-3C01

These are an "A" match which indicates that the parts are the same in materials, appearance, finish & size etc.
Specifications

Weight
46g

Groupset
Nexus

Series
3C41