This adapter raises a 50mm square, 2-inch square hitch carrier by approximately 180mm. We received numerous requests for a longer version due to interference with bumpers, so we've extended the hitch member side by approximately 50mm. Please refer to the 4th image for dimensions. Use this for hitch carriers on low-floor vehicles. The bolt near the insertion point is a fixing bolt to prevent rattling. Material: Steel. The distance from the center of the upper square pipe to the center of the lower square pipe is approximately 180mm. Can be used for both raising and lowering. Please note that the back door may interfere depending on the vehicle you are using. If you would like a stainless steel hitch pin, it is available for 1000 yen each when purchased together. A rattle prevention fitting (same color as the riser adapter) for the hitch member and adapter is available for 1500 yen. Please let us know after winning the auction. It is matte black painted and is a new, unused item, but it may have scratches and uneven paint. Please refrain from purchasing if you are concerned about the finish. We are not responsible for any injuries or accidents that may occur while using the product. No claims or returns accepted. We have not performed strength calculations, so we cannot provide a precise answer regarding strength. The material used is 4.5mm thick for the side inserted into the hitch member and 4.2mm thick for the side that attaches to the hitch carrier. Please compare this to the thickness of the steel used in your hitch carrier as a guideline. Thank you for your consideration.