This umbrella holder fits easily to the handle of the r1 push trolley the umbrella holder can be unscrewed and slotted into the underside of the handle when trolley is not in useadditionally this umbrella holder has an large internal diameter of 40mm this means that it should accomodate almost any size of umbrella handle note this product is designed for the r1 push trolley only and will not fit on the x series or f1 lithium