ITEM NAME:Trekking Hiking Pole Accessories 16 Pack Anti-Slipping Wear-Resisting Prote G3U5 Trekking Hiking Pole Accessories 16 Pack Anti-Slipping Wear-Resisting Prote G3U5 head cover is consumable so you should take spare to replacement frequently. Fit for most alpenstocks, walking poles, hiking stick, using on the cement, asphalt, artificial brick and stone pavement. Weight: 15g/unit Quantity: 16pcs the impact from pavement-walking. It's convenient to put them in your bag as spare set. Advice: Use these rubber caps on the cement, asphalt, artificial brick and stone pavement. Use walking poles ends on the dirt road and mountain-climbing. colour:black Material:rubber size:Internal hole diameter: 10.5-11mm (approx 0.43 inch) Outer diameter (upper: 0.70 inch, bottom:0.88 inch) Height: 1.48 inch Package Contents: 16*Hiking Pole foot cover Warm tips: Sometimes the old ferrules are a bit tough and you need to get a pair of pliers on them.