What is the proper size for rear window washer? and how to install it. I'll appreciate the information.

 

You can go to Trico's website for the correct size and order them from Autozone or Summit.
FF

 

Trico Exact Fit Wiper Blade part # 14-C can be found on Advance Auto Parts www.advanceautoparts.com
I just replaced mine about 3 weeks ago, easy replacement looks like original.

 

I just recently acquired an '04 Durango and it needed a new rear wiper. I saw the Trico exact Fit, but thought I'd try something else. I found that the Anco N-series of refill blades fit the channels of the Durango rear wiper assembly perfectly. I had a set of Anco N-22R refills, cut it down to 14", slid it into the assembly. Works perfectly. They come 2 to a box, but refills are getting harder to find all the time. You could even use an N16R or N18R. Just cut it down to the right size and you are in business.