Features: Use this 12mm Thru axles Adapter to replace the before Thru axles, and you can easily connecting the bike trailer hitches to the bike. Make of Metal materials and the shaft is solid. The thread is precise, does not damage the frame, and fits tightly. Equipped with 4 aluminum alloy gaskets of different thicknesses. Suitable for bicycles with different rear axles widths. There are three thread specifications to choose from (P1.0/1.5/1.75).Please measure the length of the before shaft and check the thread pitches before purchasing. Specifications: Component: 304 stainless steel and 6061 aluminum alloy Type: TC1.0/TC1.5/TC1.75 Length: about 214mm/8.43inch Package Includes: 1set Bike Trailer Thru axles Adapter 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.