The precision-crafted seat post clamp from Wolf Tooth secures your seat post while looking great. The M5 screw features a spherical washer and fits a cylindrical counterpart, ensuring that the threads are always perfectly aligned, which prevents slipping and guarantees consistent clamping force. This quick-release seat post clamp, made from 6061-T6 aluminum in our Minneapolis facility, is available in various sizes and a wide range of colors. Compatibility clamping diameter: 29.8 mm/30 mm. Frames may slightly differ from nominal diameters due to tolerances and paint thickness. Clamps fit frames that are within +/- 0.5 mm of the specified size. For example, a 34.9 mm clamp fits frames with a seat tube diameter of 34.4 mm to 35.4 mm. Clamping height: 11 mm. Note: not compatible with Ibis bicycle frames. Technical specifications: Weight: 18 g, Material: 6061-T6 aluminum, M5 stainless steel screw with integrated washer, tool interface: 4 mm hex key, torque specification: max 6 Nm. Made in the USA.