Longer Extender: Fit All 2 inch square receivers hitch tube, 14.5 inches overall length ( longer than usual extender to avoid the interference). Please check the size carefully before buy this. Gross/Tongue Capacity: 5000 lbs/500 lbs, 6-1/2 inches height difference between bottom and top receiver pin holes, 9-1/2 inch extension from hitch to bottom receiver pin hole. Widely Use: This Dual Hitch receiver are Also Frequently Affixed to Midsized Boats, Small Campers, Moderately Sized Trailers And More. Use 5/8 inches Hitch Pin Kit or Lock(Not Include). High Quality: The Double Hitch Receiver are protected with long-lasting black powder coating, which can resist all kinds of corrosive substances. Our heavy duty steel by high quality welded for superior strength, so dual receiver extension can be used for a long time without damage. Warranty: We provide satisfactory service to customers. If the product is damaged or missing parts, please feel free to contact us, we will do our best to solve it for you. UPDATE: THE UPPER 2″ RECEIVER HAVE THE SAME REINFORCEMENT COLLAR AS THE LOWER NOW. Specification: Fit All 2 inch square receivers hitch tube, 14.5 inch overall length,  use 5/8″ hitch pin or lock (NOT INCLUDE); Gross/tongue capacity: 5000 lbs/500 lbs, 6-1/2″ height difference between bottom and top receiver pin holes, 9-1/2 inch extension from hitch to bottom receiver pin hole; The Lower receiver is used for towing, top receiver used for accessories only such as a bicycle rack or cargo tray while towing your trailer or camper without scraping anything in your setup; Finished in black power coating provide durable and strong conditions, resist dust and corrosion, adds extra durability, can be used with an anti-rattle kit; Heavy duty steel via robotically welded for superior strength provide excellent mounting facility, high quality hardware fittings, all make this adjustable trailer hitch more durable; ABOUT US: is a manufacturing enterprise specialized in the manufacturing and selling of sheet metal structures. We have a product RD institution ,strict quality control group and specialized product testing equipment which guarantee the stable product quality control.