4" Square Trailer Coupler Tube: Kingpin
The 4" Square Trailer Coupler Tube with Kingpin is designed to fit standard gooseneck trailer coupler tubes, allowing gooseneck trailers to be pulled by semi-tractors. With a durable black powder coat finish and a 30,000lb trailer rating, this coupler tube is built to handle heavy loads and provide long-lasting protection. At Trailer Parts 4U, we offer this essential gooseneck part to ensure your trailer is securely attached and ready for the road. Upgrade your towing setup today—contact us to get the 4" Square Trailer Coupler Tube with Kingpin.
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