These durable 3-piece pump adapter valves are a must-have for any cyclist. Made of high-quality brass, they provide a secure seal that prevents air from leaking out of your tires. The dual-head design allows you to use either Schrader or Presta valves with your pump, so you'll always be prepared no matter what type of tube you're filling. An easy screw-on installation makes them a breeze to replace worn-out or damaged valves. Keep a set in your bike repair kit for on-the-go fixes, or replace all the valves on your wheels to ensure a dependable seal every time. At such a low cost, you can outfit your entire stable of bikes while enjoying smooth, steady inflation with your pump of choice.