Check the listing for details. Universal Bicycle Bike Trailer Hitch Baby Coupler Attachment Linker Connector US. Color: as shown, Condition: New. Listed at 12.95 USD. Feature: 1. A practical bicycle trailer hook for towing solutions. 2. Made of durable metal and nylon strap. 3. The hook adapter can be compatible with general bicycles and electric bicycles. 4. Run on quick release or flat axle wheels. Not suitable for disc brakes. 5. With a complete hook arm and hook connector, it can be easily installed without other tools. Specification: Main material: Steel + nylon Color: Silver + Black Size: about 195x50x27mm/7.68x1.97x1.06in Net weight: about 332g Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Pakcage： 1 x bike trailer coupler