Technical Specifications Weight: 34.9mm • 20g Material: 6061 T6 Aluminum, M5 Stainless Steel Bolt with Integrated Washer Tool Interface: 4mm Hex Key Torque Specifications: Up to 6 Nm Made in the USA Wolf Tooth Precision Designed Seatpost Clamps Securely Secures Your Seatpost and Looks Good. The core of this seat post collar has custom self-aligning bolts and anchors. The M5 bolt includes a spherical washer and can be combined with a cylindrical anchor barrel. This ensures that the screws are always perfectly aligned, preventing binding, ensuring consistent clamping power. Machined from 6061 aluminum in Minneapolis facilities, the Wolf Tooth Seatpost Clamp comes in seven sizes and a variety of analyzed colors. Compatible Clamping Diameter: 28.6mm/29mm 29.8mm/30mm 31.8mm/32mm 34.9mm/35mm 36.4mm 38.6mm/39mm 39.7/40.0mm Frames may vary slightly from nominal diameter to tolerance and thickness of paint. Clamps will fit frames within ±0.5mm of specified size. For example, a 34.9mm clamp will fit frames with seat tubes between 34.4mm to 35.4mm in diameter. Clamping Height: 13.5mm Not compatible with Ibis carbon bike frame Note Seatpost Clamps must match the diameter of the seat tube of the frame and do not match the diameter of the seat post itself. Product images are for reference only, actual product may vary in color and design. The color you see may differ from the actual product due to monitor settings and light conditions. In addition, please be aware that depending on the manufacturers circumstances, the specifications and weight of the product may change due to production process and improvements.