Dareu Sky V3 Heavy Blue

I don't know if these have an official name, or spring weight, but they are sold as a heavier version of Dareu Sky Blues. They were apparently meant to be used for space bars and other mod keys like we sometimes saw on vintage boards. 

Actuation Force: Seemingly over 40g

Bottom Out Force: Seemingly over 50g

Actuation: 2.0mm

Bottom Out: 4.0mm