The 25 series is the larger of Trangia stoves and suitable for 3 to 4 people. The outer pot is 1.75 and the inner one 1.5 liters in volume. Duossal pots were off market for some years, but thankfully they're now available again. The pots have an UL aluminium (Ultra Light) body and a .3 mm thick layer of stainless steel on the inside. Stainless steel is a popular material in professional kitchens, and is extremely durable and easy to clean. The Trangia is a living legend among stoves, and works just as well as it always has: it's super sturdy, doesn't get knocked down easily, it has excellent wind protection, a super quiet alcohol burner and it's essentially a ready-to-use set: all you need in addition is fuel and matches. - Alcohol burner with adjustment/choke ring and lid - 1.75 and 1.5 liter pots - Windguard and base - Nonstick frying pan works as a lid - Handle - Strap Remember to let the burner cool down properly before putting its lid back on - a hot burner can melt the o-ring