Pre Filter for Kent Water Purifier

Hi, I just purchased Kent Maxx UV+UF Water Purifier. Need help to decide which pre filter would fit this model.

This is the model link – https://www.flipkart.com/kent-maxx-7-l-uv-uf-wa...

http://www.amazon.in/dp/B008LN6156/ref=wl_it_dp...

If anyone is using this model, please suggest a suitable pre filter.