Buyers Products 3 Inch Weld-On Receiver Tubes Model RT305808Buyers Products 3 Inch Weld On Receiver Tubes Model RT305808 Receiver Tubes from Buyers Products are available in a variety of lengths, dimensions, and finishes to match your towing needs. The 2, 2 1 2, and 3 in. tubes have a cast steel collar. All tubes feature a solid stress collar opening. The 2, 2 1 2, and 3 in. tubes have a 5 8 in. hitch pin hole.