Which model aero vent roof vent cover

I’ve always purchased mine, well two of them, through Amazon, and there weren’t any model numbers, just different colors. I used Smoke on my Silver Shadow Teardrop (silver aluminum roof), and white on my white/red T@B. The openings are 14”x14”, if that helps.

I looked on etrailer.com and yes, they had a model, or part number, on the white one, but they had the description, also. 

Helpful hint: if you don’t like the morning sun coming through, smoke will dampen the light, while the white allows the light to come through, which I found I don’t mind.

I seem to remember that some have purchased the Aero Flo vent cover through Walmart.com, and I’ve never seen them in the stores. 

If this doesn’t help, @newell, tell me, and I’ll look for more info.