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From 2020 (almost) all new MSpa's will be delivered with a (fixed) filter holder (including LIDL LR04-NA LITE). The 2020 filters can go here. If you have an MSpa from 2010-2019 and you also want to use the latest interchangeable filters, you can use this filter holder.
You mount this filter holder on the inlet of the MSpa. See photo 2. Then you can click on the '2020 filters' here. These filters themselves no longer have a connector with which you attach them to the MSpa.