SB-packaged, for thru-axle, Fastening with hex nut, enables compatibility of child and bicycle transport trailers and associated couplings (e.g. Thule, Weber, Hamax, Queridoo etc.) with 12 mm thru-axles. Made of high-quality 7075 aluminum, black With the CONTEC Thrubee thru-axle adapter for trailers, you can make your bikes compatible with child and cargo trailers and associated couplings in no time. The 12 mm thru-axle is made of high-quality 7075 aluminum and provides a strong connection between your bike and your bike trailer from manufacturers such as Thule, Weber, Hamax, Queridoo and others. Main color black Type/kind of article Version replacement / accessories