Buyers Products 1/2 Inch Formed Steel 3 and 5 Position Channels Model B99121Buyers Products 1 2 Inch Formed Steel 3 and 5 Position Channels Model B99121 Heavy Duty 3 and 5 Position Channels from Buyers Products connect your trailer's coupler or tow eye at the correct height for level towing. The towing components simply bolt onto the channel at the height that meets your need. Each channel is built of strong, 1 2 in. thick formed steel. It is welded to your trailer tongue. The 5 position channel can also be ordered with weld