How many bags are in a carton of Duosol with 2 mmol/l Potassium solution for haemofiltration, and what volume does each bag contain?

A carton of Duosol with 2 mmol/l Potassium solution for haemofiltration contains 2 two-chamber bags, each containing 5000 ml: 4445 ml bicarbonate solution and 555 ml electrolyte solution.