This is Kirk's tripod mount, model NC-80-400-GN. It's currently unusable because the dedicated screws are missing. The internal screw springs are present. Although not the originals, I have some screws that should fit, so I'll include them. There are minor scratches, but I believe it should still function without issue. I bought this thinking it was for the older 80-400, but it seems to be for the newer AF-S version, so I'm selling it. Please understand that this is not in perfect condition, and purchase only if you accept the item as-is (no returns, no refunds).