smartCRUTCH Foot Ferrules are Supplied as Single Units or Pairs. smartCRUTCH Ferrules includes Endcap and Fixing screw   Compatible ferrules for smartCRUTCH: SmartCrutch (before 2019) = Flexyfoot 22mm (View & Buy Here) SmartCrutch (after 2019) = Flexyfoot exclusive (View & Buy Here)