BOX ONE QR 31.8 BLACKBox One QR seat clamps are cold forged and CNC machined from 6061 T6 aluminum alloy A quick release lever makes adjusting your seat height quick and easy Weighing just 28 grams in the 31. 8 size, it is as lightweight as it is tough The head of the quick release lever and the face of the clamp are given a proprietary zero friction surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing Titanium
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