Pure copper material, resistant to rust and corrosion. Includes gasket ring to prevent leakage and ensure tight seal. Helps extend tire life, reduce fuel consumption, and improve driving safety. Ideal for use in bike repair kits or tool sets when using Presta valves (common on road bikes, mountain bikes, and some children's bikes) with Schrader pumps (standard car valve type used in garages and most household foot pumps). Precision-made from brass with a small rubber seal for efficient tube inflation and improved sealing. Functions effectively even without the seal when using a compressor or fast pumping. Type: Presta to Schrader Valve Adapter Converter Material: Copper, Rubber Quantity: 10 Pieces Features: Bicycle accessory, adapter cap, durable, good sealing performance Size: 1.7 cm x 1 cm / 0.67 in x 0.39 in (Approx.) Note: Due to lighting and screen setting variations, the item's color may differ slightly from images. Slight dimensional differences may occur due to manual measurement. Package Includes: 10 x Presta to Schrader Valve Adapter Converters