The trekking pole tip can be used to replace old ones or as a backup replacement in case your trekking pole tips are lost or worn out during hiking, and will fit most trekking poles. The spherical shape works well on a variety of surfaces such as grass, roads, mud or hills Color: Black; Material: Engineering plastics; Hole Inner Diameter: 11mm; Overall Size: 45mm x 56mm / 1.77 inch x 2.2 inch (OD*Height) The bottom is a non-slip design that increases grip and traction, and improves stability. Made of thick engineering plastic for durability, with an embedded metal layer added to prevent perforation from excessive force and prolonged use, and to extend the life of the tip Take the old one and screw the new one on the end of the trekking pole NOTE: Please note the applicable trekking pole sizes. The trekking pole tip can be used to replace old ones or as a backup replacement in case your trekking pole tips are lost or worn out during hiking, and will fit most trekking poles. The spherical shape works well on a variety of surfaces such as grass, roads, mud or hills. Advantage The bottom is a non-slip design that increases grip and traction and improves stability. Made of thick engineering plastic for durability, with an embedded metal layer added to prevent perforation from excessive force and prolonged use, and to extend the life of the tip. Instruction Specification Color: Black Material: Engineering plastics Hole Inner Diameter: 11mm Overall Size: 45mm x 56mm / 1.77 inch x 2.2 inch (OD*Height) Packing List: 4 x Trekking Pole Tips