Cybex Base G BlackCYBEX BASE G BLACK Getting your child in or out of the car has never been easier thanks to the Base Gs rotation mechanism and Driving Direction Control putting them in just the right position. Only compatible with the Cloud G i Size and Sirona G i Size car seats. Maximum age. 4 years Age range (when combined with the Cloud G i Size): From birth up to approx. 24 months Age range (when combined with the Sirona G i Size): From birth up to approx. 4 years