Hi, you will get a case right inside the box. It’s a regular transparent silicone case.
Regarding screen protector: It comes with a typical plastic screen protector pre-applied. No word yet if there will be a good quality tempered glass protector offered directly from Nothing. However considered they haven’t released one for Phone (3a) series at all, I wouldn’t hold my breath. Our best bet might again be some 3rd party brands like Spigen to introduce their own accessories for the phone.