An actual human reviews every single order. We look up your RV’s specs to make sure that you have the correct kit, which is why we insist on getting your exact year, make, and model. If you’ve ordered the wrong kit, someone will contact you to let you know and tell you which kit is the correct one and what steps to take next. Sometimes we need to send an invoice for the difference in price for a bigger kit, other times, we owe a refund if you bought too big of a kit or an unnecessary item.
If you need help finding your RV’s model number, we’ve put together some info here. You can look up the length here and this page explains ground clearance.