"These Ultra-Tow telescoping posts with foam balls on the end let you perfectly connect your trailer by yourself every time. The posts have magnetic bases, so you attach one to your ball hitch, the other on your trailer and adjust them so they're the same height. Then all you have to do is look at them through your rear window. When the foam balls are aligned, your hitch and coupler are too. Perfect for boats, RVs, campers and more. Product Style Post, Length in. 13 1/3, Length Extended in. 43. Chrome-plated to resist rust"
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