Forest Byke Company Presta to Schrader Valve Bike Pump Adapters - Aluminum Black - Set of 4 Inflates Tire Using Standard Pump or Air Compressor Converts French/UK Valve to US Schrader Valve Aluminum alloy with rubber o-ring seal Package of 4 Presta Adapters 100% SATISFACTION GUARANTEE - If you are not happy with your purchase for any reason! Just return through Amazon.