The body made of high-quality aluminium alloy is sturdy, tear-resistant, durable for long use. Lightweight and portable, can be attached to the rear pannier rack, very convenient to carry. Suitable for American and French air valves, fits almost all bicycles. The pedal has a non-slip concave and convex design, the air pump is more stable. High efficiency, more air per stroke, a good help. get in the way.