This is a genuine Yashica lens hood for old cameras. I believe it was an optional accessory for the Electro 35 GT. Outer diameter 63mm, inner diameter 57mm, height 19mm. It can be attached to a standard 55mm lens filter thread, so it fits 50mm equivalent standard lenses. A genuine leather case is included and it's in near-new condition. I am also listing other bodies and lenses, so please take a look if you're interested.