[DURABLE] This bicycle valve is made of high-quality brass and features a rubber O-ring to 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 quick conversion by simply loosening the tip of the Presta valve and screwing on the adapter, enabling efficient inflation with standard pumps. [EXTENSIVE USE] Suitable for bicycles, road bikes, folding bikes, and most mountain bikes. These valve stem adapters make tire inflation quick and convenient. [YOU WILL GET] 6 x Presta to Schrader valve adapters, 12 x Presta valve covers, providing reliable value for your cycling needs. [MULTI-PURPOSE ADAPTER] Converts Presta valves to Schrader, allowing compatibility with various standard air pumps and compressors. Product Description 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 color variations between the image and actual item. Measurement may vary by +/- 1-3cm.