[DURABLE] This bicycle valve is made of high-quality brass and features a rubber O-ring to help 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] These valve stem adapters are compatible with bicycles, road bikes, folding bikes, and most mountain bikes. They make tire inflation simple and convenient. [YOU WILL GET] 6 x Presta to Schrader valve adapters, 12 x Presta valve covers, providing practical value for everyday cycling needs. [MULTI-PURPOSE ADAPTER] Converts Presta valves to Schrader, allowing use with various standard air pumps or 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. Only the listed items are included; other products are not part of this package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.