Black Diamond Flex Tips Long are replacement Flex Tips for Black Diamond's general trekking poles such as the Trekking Pole and the Compactor Pole.NB NOT compatible with the interchangeable Z-Pole Carbide Tips and Z-Pole Rubber Tips. If you want this compatibility you will need Flex Tech Tips instead. Can be used to make a cheap repair of aging Expedition Poles whose tungsten tips have warn out/fallen off - fit over end of pole and tap firmly into place by banging down on a hard surface.97mm long (including the tungsten tip) and 11mm internal diameter at the top (they are called long because the originals were shorter but these are no longer made).Friction fit - knock the broken tip off by sliding a hammer smartly down the shaft then fit the new tip and tap it sharply on a piece of wood on a firm surface to seat it.