The Bestway Air Hammer 3500 ML Manual Air Pump inflates tubes, air mattresses, rafts, toys, and other inflatables. Designed to provide maximum airflow, this pump has a stroke volume of 3.5 L/cycle and features a large air chamber for rapid inflation. It delivers a continuous stream of air on both the up and down strokes, meaning you're able to fill your items faster than single-action pumps. It's great if you don't have access to electricity and times where you need to inflate your items on-the-go. Plus, three universal valve adapters are included to fit nearly every inflation valve, so you're able to inflate a variety of items with the same Bestway Air Hammer pump! This pump is built for fast inflation and deflation of tubes, air mattresses, rafts, toys, and other inflatables. With continuous airflow on both the up and down strokes, this pump ensures quick inflation, making it suitable for on-the-go use. Three universal valve adapters are included for compatibility with various inflation valves, enhancing versatility. Designed with travel in mind, this pump is a convenient companion for outdoor adventures. This pump has a generous stroke volume of 3.5 L/cycle, ensuring efficient inflation for your inflatable items.