DescriptionReplaces the old leaking valve, make the tire rejuvenation. Stop air leaks from old valves. These cores is copper nickel-plated cores .The nickel plating enhances the corrosion resistance of the core and stem, especially when installing the core into an aluminum stem.Features- Brand: LIOOBO. - Color: Silver. - Material: Metal. - Size: 2.5 x 0.5 x 0.5 cm. - Replaces the old leaking valve, make the tire rejuvenation. Stop air leakage from old valves. - Universal compatible. Good airtightness. For replacing bad presta cores. - These cores is copper nickel-plated cores .The nickel plating enhances the corrosion resistance of the core and stem, especially when installing the core into an aluminum stem. - More durable, safe and reliable. Non-slip design that increases the friction of your hands, saving your time and effort.