forgot what to call plastic thing to stick on rear window

[cac43]

I need to get a new square plastic that sticks onto the inside of the rear window which makes easier to see the car I am towing. I for got what it is called- tried to find it on several sites to find/order one. help. thanks. chuck

[Esacnj]

I had one and after removing it found that my window was permanently discolored. Apparently the glass lamination was affected by the sun.

[cac43]

Thanks very much- I'll give that a try.

[wa8yxm]

The proper name is Frensel lens if I spelled it right, I did. Nick name is Fish Eye Lens

And of course to make it easy..

Like the one in this Amazon Link

[Bumpyroad]

also check out fresnel lenses
bumpy

[IAMICHABOD]

Here you go Take your pick

[BB_TX]

Google car rear window magnifier. Lots of options.