This is the 12 extra inserts for focusing screen. Black lines printed on transparent base. You can just put it over focusing screen and change them easy and quickly. Here is the samples.

You can use it for any medium format camera with 6x6 frame: :

• Hasselblad
• Mamiya
• Bronica
• Rolleiflex
• Pentacon SIX
• Practisix
• Exacta-66
• KIEV-60
• KIEV-6C
• KIEV-88
• KIEV-88 CM
• KIEV-80
• KIEV-688
• KIEV-SIX
• ARAX
• Zenith-80
• Salyut
• Salyut-C
• Hartblei
• B.I.G.-SIX
• Hasselblad
• Mamiya
• any other 6x6 medium format cameras

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