This adapter raises a 50mm square, 2-inch square hitch carrier by approximately 180mm. We received numerous requests for a longer version of the previous model because it interfered with the bumper, so we've made the hitch member side approximately 50mm longer. Please refer to the fourth image for dimensions. Use this for hitch carriers on low-floor vehicles. The bolts near the insertion point are for preventing rattling. The material is 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. 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 are 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 that inserts 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.