This adapter can be used to install Kiev-16U lenses (16mm movie film format) onto cameras with Sony E-mount. It allows infinity focus.
Female thread is M32x0.5mm.
Kiev-16U is 16mm film movie camera, so its lenses vignette on usual sensor. But some E-mount cameras allow shooting in cropped mode, and 16mm lenses will be applicable there.
The adapter is made of anodized light alloy. Color is black, but may vary a bit (brown tint).