Dahon Handlepost Upper Section Cap 28.6mm Silver  Suitable for the adjustable Radius and Radius V Handleposts. As this product is factory matched (and Dahon handleposts have been made in many different factories) it may be necessary to file the hinge area slightly in order for it to fit     To be Clear,  this is for a 25.4mm Handlebar,  the 28.6mm refers to the upper telescopic section of an adjustable height handlepost - yours may be a fixed type in which case the 28.6mm is irrelevant and does not apply.  Silver Supplied.