10 Pcs Converter Presta, Marrywindix Presta Schrader Bicycle Bike Valve Adaptor Tube Pump Tools Convert a Presta Valve to a Schrader Valve. Also turn a UK Valve into a US Valve Size:Approx.1.5cm x 0.9cm x0.7cm.(LxBig head diameterxSmall head diameter) Package: 10 x bike tube tool Color: golden