Usage Tips:1. Premium Material: Trailer receiver tube is made of cast steel material, high hardness, rustproof, not easy to break or deform, sturdy and durable. 2. Protection: Trailer hitch receiver adapter is protecting your vehicle from scuffs, scratches and even dents, has a long service time. 3. Excellent Performance: Professional manufacturing, exquisite workmanship, spraying plastics surface, stable performance and hig reliability. 4. Size: Square opening inner diameter is 52x52mm/2.05x2.05in, total height is 130mm/5.12in, bolt bore diameter is 16mm/0.63in. 5. Easy Installation: Easy to install without any modification, no complicated operation is required, convenient for using, save your time and energy. Item Type: Trailer Receiver Tube Square Opening Inner Diameter: Approx. 52x52mm/2.05x2.05in Installation Size: Center Distance: Approx. 85x45mm/3.35x1.77in Bore Diameter: Approx. 13mm/0.51in Total Height: Approx. 130mm/5.12in Bolt Bore Diameter: Approx. 16mm/0.63in Fitment: Universal Colour:Black Material:cast steel Package Contents: 1 * trailer hook connector Only the above package content, other products are not included. Note: Light reflection 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.