Unique Design - for your bike. You can ready in seconds by just removing or tightening one nut. The hitch adapter is suitable for types of pet trailers/cargo trailers/child trailers. Material - The hitch connector bike trailer made of steel with black enamel coating, and sturdy, equipped with precision welding technology, can bear heavy duty. Family Fun - Through this coupler hitch attachments, your bike can be equipped with a towing trailer for your child to enjoy riding. Trailer Coupler Dimension - The size of junction part to bike about 4.5 x 2.5 x 3.5 cm/1.77 x 0.98 x 1.37 in ,weight:93g/0.2lb.This will fit Type A trailer. This will NOT fit all bike trailers. See from photo and dimension if this will work with your trailer.<br><br>Colour:black Material:metal<br><br>Package Contents: 2 x bike trailer coupler<br><br>Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.