Medium Firm Rubber for Max Grip BUNDLE PACK: Great value on 4 durable rubber tips made with vulcanized rubber Unique designs provides stability for all types of hiking and walking. UNIVERSAL: Fits most of nordic walking, trekking, walking, or hiking poles (1cm/.4in opening) Fits all standard walking pole including Black Diamond, , Cane, Komperdell, , 100% carbon fiber, , Hunger Hiker, Montem, Cascade Mountain, , BAFX, , Bangail, , or Nordic Tapered (Medium Firm) - For those who use these as walking poles (including Nordic walking) these are a softer medium rubber tapered tip that grips the surface better than standard tips. Great for walkers that prefer these tips but like extra stability size: 5.5*5*2.8cm colour: black Material: rubber Package Contents: 4 * Trekking pole torpedo head cover Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.