If you post a pic of your furnace vents, that would let everyone know what you have and be able to recommend the right screen(s). Some of the furnace vents are in a rectangular base, and some of them are two circular openings, so there are different types of screens.
2015 XLR Hyperlite 30HFS5 (mods being performed regularly)
2009 Salem LA 292fkds (gone)
Nights- ('12)23 ('13)23 ('14)15 ('15)31 ('16)25
2014 Harley Davidson FLHX (XLR cargo)
2014 VW Jetta TDI (diesel sipper, camping support vehicle)
2011 Ram 2500 CC 4X4 CTD, B&W Companion (toy hauler hauler)