The Burley Trailer Hitch Adaptor Thru Axle is a component designed specifically for Burley trailers, with a length of 197mm. This adaptor is meant to be used as a thru axle for easy installation and compatibility with Burley trailers. It is a single item that helps users securely attach their trailers to their bicycles for a smooth and efficient cycling experience. The Burley brand ensures quality and reliability, making this adaptor a practical and essential accessory for cycling enthusiasts with Burley trailers.