An innovative cistern that brings a combination of outstanding efficiency, modern design and simple installation. The Sigma Duo kettle allows you to adjust the volume from 6 to 9 liters of water, adapting to your needs and promoting water saving. Flexibility in choosing the volume allows you to optimize water consumption according to your preferences and needs. Powerful flushing enables thorough cleaning of the toilet bowl with minimal water consumption, providing you with a clean and hygienic bathroom with a minimal impact on the environment. White color. Made of polypropylene. Dimensions: 44×12.5x36cm.