The Topeak Gravel 2Stage mini pump is a compact and innovative pump designed specifically for gravel bikes. It features a 2Stage pressure selector that allows you to choose between high volume or high pressure, making it easy to fill your tires quickly and effortlessly. The pump has a Presta valve with a thumb lock and integrated dust cap. Its barrel is made of aluminum, providing durability and lightweight performance.With a capacity of 90 psi / 6 bar, the Gravel 2Stage pump is capable of reaching a range of pressures. Stage 1 allows for pressure between 0-60 psi, while Stage 2 can handle pressures between 60-90 psi. The pump offers different volumes per stroke depending on the stage. Stage 1 provides a high volume of 71 cc per stroke, while Stage 2 offers a high pressure of 24.8 cc per stroke.The Gravel 2Stage mini pump is designed with an aluminum handle for comfortable and easy pumping. It also includes an added feature of a side mount bracket (Art No. TDP-2C) for convenient storage when not in use. The pump has a compact size, measuring 18.4 x 3.6 x 2.8 cm / 7.2"" x 1.4"" x 1.1"", making it easy to carry in a jersey pocket. It weighs only 101 g / 3.56 oz, ensuring that it won't weigh you down during your rides.Overall, the Topeak Gravel 2Stage mini pump is a reliable and efficient pump that is perfect for gravel bike enthusiasts. With its 2Stage pressure selector, durable construction, and compact design, it offers everything you need to keep your tires properly inflated while on the go.