This black Heavy Duty Ferrule is 16mm (0.65\"), five eigths of an inch in diameter, very hard wearing and longer lasting than most standard type ferrules.The ferrule is designed to securely fit on the end of a walking stick which helps to drastically reduce the risk of the stick slipping and improving user safety. The Heavy Duty Ferrule is also suitable for use on other walking aids such as crutches and walking frames and is available in two different sizes, both of which can be found in this area of our shop, along with a range of money saving multi-buy special offers.We also stock a full range of standard replacement ferrules, suitable for a wide range of purposes and designed to fit all types of walking aids. We appreciate that there are a lot of options available, so please don\"t hesitate to call us, if you require any additional advice or guidance.