Users of Hero3 and the large 60m diving case need the replacement kit with the number 3661-054.
Unfortunately, the 3661-054 Kit no glass protection lens for the Cam is in yourself, if you want to use these without immersion housing.
GoPro big to 60m depth continuous housing is designated as a "Dive" -Housing / housing.
If you want to use the Cam "naked" or in an open frame,
then the supplied lens is making very good protection without getting in the recordings a negative impact.
The lens acts as the high-quality China lenses that you get in many packs.
And the cap from the protective housing is very convenient if you just look at the Cam in the bag, or wherever,
wants to trick without the protective glass to scratch.
Also covers the Einschltknopf, so that I often happens that does not address the Cam unintentionally.
If one uses the Power, is in the immediate added that a blessing no action in the storage bag is already noted for posterity.
Fits only to the new Hero3 + housing for 40m !!
The rest of fits and is more of a necessary evil expensive.