Yes they do- but only with the GoPro Protective housing. They dont fit onto the Hero 11 camera directly.
Its a different type of fit from previous filter versions but much easier to use.
The DiveMaster filters are compatible with the GoPro models Hero 9, Hero 10, Hero 11, Hero 12, Hero 12 Black, GoPro Hero 11 and GoPro Hero 13. There are specially developed filters for the GoPro Hero 7 Black and its Super Suit, which are not compatible with the newer DiveMaster filters. The filters for the Hero 7 Black are only suitable for the Super Suit of the Hero 7/6/5 series and differ in shape and attachment from the newer models. Therefore, the DiveMaster filters are not compatible with the GoPro Super Suit of the Hero 7 Black.
Yes, the filter is compatible with the GoPro Hero 13 and has been specially developed for the protective housing of the GoPro Hero 9, Hero 10, Hero 11, Hero 12 and Hero 13.
You've just answered your own question... 8-D
If your GoPro13 fits into an original GoPro 12 dive housing, then you can use these filters with this 12 housing.
To use the PolarPro DiveMaster filters with your GoPro Hero 9, you do need a protective housing. The DiveMaster filters are specifically designed to work with the GoPro Protective Housing, which is compatible with the Hero 9, 10, 11, and 12 models.
The filters will not fit directly onto the camera without this housing, so you must have the appropriate protective housing to use the DiveMaster filters effectively.
They fit very well on the GoPro 9 and are also labelled as such. The other housings are different and these filters should not fit. It is actually clear in the description for which housings they fit.