Thickness of the YYF 19mm slim pads?

Yo-Yo Mods and Maintenance
1

Does anyone know the thickness of the Yoyofactory CBC 19mm slim pads? Or the depth of the groove on a protostar?

Thanks.

2

Thickness of CBC Slim Pads should be right around 1mm. Protostar is built for them so I would imagine the groove is about the same