---Pack of four durable grey pear-shaped shock absorbing rubber ferrules for American-stlye underarm (Lofstrand) crutches, walking sticks and canes ---Eases strain on the joints - base bends and conforms to surface irregularities ---To fit walking sticks and crutches with tubing diameter of 19mm (3/4") - please check the measuring guide photo ---Larger base than standard rubber ferrules for extra grip ---Reinforced with metal washer 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.