Metallic Dark Slide for Arax/Kiev Medium Format Film Magazine
This is original factory made spare dark slide ('light gate' or 'shiber' - in Russian) for all medium format Arax/Kiev film marazines.
No mater the type of magazines, Old or New type, it fits to any of them. That film back used at cameras: Salyut, Revue 6x6, Vitoflex, Salyut-C, Zenith-80, Kiev-88, 88-CM, Arax, Hartblei.
Also fits to Hasselblad "V" film magazines: A12 A16 A24 A70 C12 E12 E24 E16 A32. Made in Ukraine (Zavod Arsenal) and has absolutely same size as Hassy one.
If the dark slide has deformation, it can cause the light leak on your film back.