Brompton Union Jack Valve Caps – Schrader (A/C/G Line)Brompton Union Jack Valve Caps Schrader (A C G Line) A small detail that makes a statement. Replace your dull plastic caps with these Union Jack valve caps a fun nod to the most iconic British bike in the world, made from durable carbon and copper. Why you'll like it Distinctly British Union Jack design perfectly matched to your Brompton Premium materials carbon and copper, more durable than standard plastic caps Easy fit screws directly onto your