Trangia EVA 25

A hard case for the bigger Trangia set, the 25.

This case swallows your Trangia 25 whole. How do I know if my Tragia is a model 25 or a model 27? From the saucepans/pots: in the 27 both have a volume of 1 liter, in the 25 one is 1.5 liters and the other is 1.75 liters.