Описание товара на английском языке:
Sera air pumps provide electronic output control and are amongst the most silent pumps in their category. The 550 R Plus has two powerful and durable diaphragms which run independently and provide a free airflow output of 550 l/h. Its features make it suitable to run multiple internal filters (sponge, box or undergravel type), as well as pond oxigenation.
Connection sleeves are made from robust metal alloy. The inside machinery is completely detachable (except electronic components) which makes perodical cleaning easy as well as part substitution. There are available spare parts for pumping chamber, diaphragms and air filters.