Hello Virginia, thanks for reaching out. For your 2018 Fleetwood Flair LXE 30U I recommend the ClearPlus 77 Series HD Windshield Wiper Blade # CP77321. This is a 32" frame style wiper blade and it will work with the standard 12x4 J-hook. I like the ClearPlus blades quite a bit. I use these on my car and I have been completely satisfied with their performance. The frame is flexible which makes for consistent coverage of the windshield with very little streaking or bouncing. Generally the... view full answer...