Specifications of the roller brake:

Brand:    Shimano
Type:    BR-C6000
Front / Rear:    Front
Cooling fin diameter: 150MM
Color:    Silver


Fits on any roller brake hub.
https://bike.shimano.com/nl-NL/product/component/nexus-c6000-int8/BR-C6000-F.html


The SHIMANO NEXUS Front Roller Brake Hub delivers 30% more braking power and improved braking performance under heavy loads. It exceeds the EN 130kg front gross weight standard.