Eye cup rubber shows some wear, mostly around the upper rim, but it looks good. I don't see anything damaged. I don't know what camera brand it might fit. Maybe it is for scope? Or maybe for microscope eye piece?

Rubber eye piece does not have any threads. It is only rubber. It seems to be slip on type eye piece. 

Eye cup will be mailed just as pictured, so please look at the pictures above.  I will pack it well to protect it from damage during transportation.

Shipping is free within USA and $7 via first class USPS air mail service worldwide . You can choose faster (and more expensive ) shipping if desired during checkout.