WWW: https://tactel.se

Images/Logos: http://web.tactel.se/img/

Tactel Root Certificate(s):
Tactel Root CA 2017: TactelCA2017.pem
Tactel Root CA 2017 (txt): TactelCA2017.pem.txt (if your browser doesnt want to download/show .pem files)

Root Certificate (Authority) Installation Instructions.

IT-Wiki