Nissan Almer's rear gate shock absorbers

Hi, the Nissan Almera Tino 2.2 rear gate shock absorbers do not work.
The gate weighs a lot and I have to carry the purchase in the seats.
Do you know what a reference they have? How do they change? Where can I buy them?
Do you know where I can get the Nissan Almera Tino 2.2 spare class catalog to see the reference of the pieces?
Thank you very much to all
Note: Since the message was not erased, I have given you several times to apologize

You can buy them by sample ... and even with the sample you can buy some better that resist more weight ..

Thank you, what happens is that I want to know the reference first and the measures and then buy one with the same characteristics, since for what I have read it has the same long.

Thank you, what happens is that I want to know the reference first and the measures and then buy one with the same characteristics, since for what I have read it has the same long.
Buy for a sample, do you mean that I first remove one of the shock absorbers (or braces I don't know very well what they are called) and then go with him to buy one?
I thought that once you know the measures to buy them online

These can be one of the references:

right rear gate support 90450-BU000

left gate support 90451-BU000

A Greetings