NIUNIU A innovative, small, multifunction, handy tool designed to install and remove valve cores, also valve extenders with 5mm wrench flats. CNC machined, anodized finish, slim, lightweight and easy to carry out. A must have tool in your saddle bag Easily tighten or remove valve cores on bicycles, cars, trunks, and any other air filled tires. Also can be used for valve extenders with 5mm wrench flats. Fits between spokes for quick and easy core removal. Brass replacement valve core in a set- High-quality copper nickel-plated valve cores .Used to replaced the leak of the old valve make the Tire rejuvenation. Stop air leaks from old valves .Universal compatible. Quantity: 10pcs color: blue Size: about 54mm long Width about 4.3mm