They are bigger than a Green but smaller than a grey, a very nice intermediate injector mate, well worth keeping.
These injectors came factory fit in USA Ford Mustangs 5.0L V8 engines and lincoln limo cars, Aston Martins amongst others.
The flow rate is around 440 cc/min.
I ran these in my old saph on my old engine and it made a cosy 400 reliable horses.
For sale, they will prob make £150 on ebay.