I have an 18K Superglide hitch for sale. These are great for towing with a short bed truck. The hitch automaticaly slides rearward during a turn to keep the trailer from hitting the cab of the tow vehile. It is the 4400 model wich at the time the hitch was made was an 18K. On the Superglide web site they are now calling the 4400 a 20K. I am unsure if this rating pertains to the older hitches or not. You ould have to check with them. I have all of the rails and pins for the hitch. I even will thirow in a capture plate for the trailer. I no longer have the frame brackets but they are available from Pulrite.The hitch is in Bakersfield. Delivery to So Cal can be negotiated. I am looking to sell for $900.00