Features: This retractable bicycles Tows rope system is great for helping children cycle whilst they maintain control of steering and balance. Make from plastic, not easily break. When towing another bicycles, you can maintain strong and flexible tension. Easy to installation. Hooking it behind one bike's seatpost and connect it to the trailing bike. This universal towing system is great for family cycling trip and can work with electric bikes, mountain and road bikes. Bicycles Tows Rope is the perfectly solution for towing your kids or friend on their bikes. It can ride over uneven or puddle without breaking or tangling. Specifications: Component: plastic Size: as shown in the picture Package Includes: 1set Retractable Bike Tows Rope System note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.