The Bestway Air Step 800 ML hand pump inflates tubes, air mattresses, inflatable boats, toys, and other inflatable items, and allows for easy deflation. It is designed to provide maximum airflow, has a stroke volume of 0.8 liters per cycle, and features a large air chamber for quick inflation. It delivers a continuous airflow with each downward stroke. This pump is ideal when you don't have access to electricity or need to inflate items on the go. Additionally, three universal valve adapters are included, fitting almost any inflation valve, so you can inflate a variety of items with the same pump. With its compact design, the Bestway Air Step 800 ML hand pump is perfect for travel when you need to pack light.