Shaft diameter: Φ15mm, 65cm. Knurling diameter: 14mm, length 5cm. This is a 64 titanium piton shaft. The total length of the knurled section is approximately 55mm. Material: Gr5 Ti-6Al-4V, commonly known as 64 titanium. Other lengths and specifications are available. If you have any requests, please ask via the question form.