DESCRIPTION ---Pack of four grey 19mm (3/4") ferrules ---High quality natural rubber ferrule for walking sticks, canes and other walking aids with a 19mm diameter shaft ---The sizing refers to the internal diameter of the hole in the ferrule. Please check the photo above, showing how to measure before ordering. ---Can be used for other adaptations ---Metal washer inside for long life 100% Satisfaction Guarantee - we want you to be happy with your purchase so if you do have any problems please send us a message and we will do our best to sort it out. Should you feel that you need to leave negative or neutral feedback please give us the opportunity to rectify the situation first.