This is a protective transparent housing for the NerdCam3D. The housing consists of three parts: a front plate, a back plate and a center frame - connected to each other by 4 stainless-steel M2.5 screws with lock-nuts and washers (all included in the set). The camera PCB resides between center frame and back plate. You may re-enforce the mechanical stability of the housing by gluing the front plate to the center frame.