I got a good deal on a Mr. Heater tank top propane heater to get me through this year. Unfortunately, they sent a bolt that was too short to fit the brace for it. I don't know it is a quality control, design, or engineering issue, or if someone thought they would save a couple of cents on each unit. All I know is that they got it wrong, and that is about the way some companies think of their customers these days. I am disappointed that an otherwise good unit would have something so simple overlooked.