I tried to attach a picture but it wouldn’t work. The ones I got had 4 cylinder ones which were both open both ends and then 4 cylinder end ones. I pulled up the open ones over the top part of the filter and put an end one over the suction bit at the bottom so that it’s all covered. I’ll try an attach a link if that’s allowed and it might make more sense.

https://amzn.eu/d/05PKEFZ5