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DURABLE: This brass bike presta valve core and closely matched Presta stem are compatible and provide a good seal Product design: Lightweight and portable, it can replace the leakage of the old valve and rejuvenate the tire, which can help you improve efficiency 【Wide Use】These universal presta valves fit for road bikes, folding bikes and most mountain bikes You Will Receive: 2Pcs Presta Valve Core Core Extractor Tool Presta Valve Core 1Pcs EASY TO INSTALL - Presta bike valve core is textured and non-slip for easy grip during assembly and disassembly