You are looking at 4 x 22mm Crutch Ferrules manufactured by Coopers.
4 of 25mm Coopers Crutch tip Walking Stick Frame Ferrules Stick End 1"
4 of 16mm Coopers Crutch tip Walking Stick Frame Ferrules Stick End 5/8"
4 of 22mm Black Ferrules Crutch tip Stick Frame Ends 7/8"
20 x 22mm Coopers Crutch Ferrule Walking Stick Ferrule
4 of 18mm Grey Coopers Ferrules Crutch tip Stick Frame Ends 11/16"
4 x 22mm Rubber Ferrules For Walking Sticks, Canes or Crutches
