1. Made of high-strength aluminum alloy, CNC processed, sturdy and durable 2. Lightweight split design, 25mm/30mm double bolt configuration, suitable for more frame types 3. Surface anodized treatment, bright color, chamfered edges, deburring treatment, not prone to fading 4. Installation is very simple, the zipper device can be installed on one side or both sides according to the need 5. Split zipper device, mainly for adjusting the chain tension of folding bicycles to prevent chain loosening and chain detachment 6. Applicable: only applicable to bicycles with a rear fork, with a rear opening structure of 10mm diameter 7. Material: aluminum alloy + stainless steel 8. Weight: about 12.4g
