Mirage bicycle trailer coupling This bicycle trailer coupling ensures that you can easily connect the bicycle trailer to your bicycle. The coupling can be easily mounted to the saddle bolt of your bicycle. You can mount the end piece to the bicycle trailer and click it into the coupling. You can also easily disconnect the bicycle trailer. Specifications: Color: silver Material: steel Dimensions: 8 x 4.5 x 5 cm (L x W x D) Product type: 1050010 Contents: 1 Bicycle trailer coupling 2 Filler rings for seat post