This is one of the Stage 3/4 HERO Facial Appliances worn by principal actor Arnold Schwarzenegger as the Terminator T-800 in the explosive 1991 sci-fi action movie, 'Terminator 2:Judgment Day'.
Made of foam latex as well as rubber, this right side facial appliance covers the upper right side of the face including the top of the skull, around the eye, and cheek. The skin features artificial wounds (created to look as though the skin was ripped off) which are detailed with fake blood and helped give Arnold the illusion of a robot interior, creating the smooth transition from Arnold’s actual face into the terminator’s metal skeletal structure. The other side of the item features a rubber appliance that made for an easier fit onto Arnold's face
This type of appliance can be seen in many publicity shots and is also the type of appliance worn by Schwarzenegger when he says the immortal line - "Hasta La Vista, Baby".
These appliances were created and finished in preperation for filming- this piece was ultimately not used on screen but was created as a back-up. was marked on the underside with 'A' (presumably for Arnold).
It is an instantly recognizable piece from an outstanding movie.