Made of heavy duty metal cylinder. Easy to read 45mm guage. Includes clip for easy storage. Can be used for various inflatable items. The foot-operated air pump can be used for a variety of inflatable items, such as bicycles, car tires, basketballs, footballs, and swimming rings, with a wide range of applications. A foot air pump is a powerful and convenient tool for any cyclist who wants to keep their bike tires inflated and in good condition. It typically has a built-in pressure gauge or comes with a separate gauge to ensure that you inflate your tires to the correct pressure. Foot air pumps are designed to be operated by foot, you can press down on to pump air into your tires. This makes it easy to inflate your tires to the desired pressure without exerting too much effort. Some models may also include additional features such as an ergonomic handle or a non-slip base for added stability during use. With its convenience and ease of use, a foot air pump is a great investment for any cyclist who wants to keep their tires properly inflated and enjoy a smooth and comfortable ride.