The 11 x 8.5in / 28 cm x 22 cm bestwayï؟½ air step ï؟½ inflation pump inflates and deflates your buoys, air mattresses, canoes, toys, and other inflatable accessories. Designed to provide maximum airflow, the pump produces a continuous flow of air in both upward and downward movements. It allows you to easily inflate and deflate your inflatable accessories. 3 universal connectors are included. Pump with very robust construction.