[DURABLE] This bicycle valve is made of high-quality brass and closely matched with a rubber O-ring, which can effectively prevent leakage. The valve cover helps protect against corrosion from muddy water. [PRODUCT DESIGN] Lightweight, portable, and easy to install, this Presta to Schrader adapter allows you to simply loosen the tip of the Presta valve and screw on the adapter, enabling faster and more convenient inflation using various pumps. [EXTENSIVE USE] These valve stem adapters are suitable for bicycles, road bikes, folding bikes, and most mountain bikes. They make tire inflation quick and easy, enhancing your riding experience. [YOU WILL GET] 6 x Presta to Schrader valve adapters, 12 x Presta valve covers, providing reliable value and meeting everyday needs. [MULTI-PURPOSE ADAPTER] The bicycle valve adapter converts Presta valves to Schrader, allowing compatibility with a wide range of standard pumps and compressors. Color: Gold + Black Material: Metal + Plastic Size: Outer diameter 9.9mm, length approximately 12.7mm Package Contents: 6 x Presta to Schrader valve adapters, 12 x plastic Presta valve covers Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.