Review on Efficient Camco RV Roof Vent Cover: Optimal Air Ventilation for Your RV, Rain or Shine by Haggis Bryant

This unit will have a higher price tag but there are two Camco Vents 40431 and this 40433 that sell for a lot more. According to an email from Camco, both vents are exactly the same, although this one, 40433, looks like it has a screen and 40431 doesn't mention it. So save the money it cost me and buy 40431 and get the same item. (The 431 is sold by Camco in batches of 10 while the 433 is sold in batches of 5. They use different part numbers rather than the same part number with -10 or -5 at the end.) Update 10/24/2018 from three stars to one I have Bought in 2015 but installed in 2016. In this year 2018 I noticed that one of them was missing. After reading some of the recent reviews I believe one unit has fallen apart and been deflated. I will switch to Maxxair blocks.