This is a new Eaton stainless steel valve set, 1.88" Exhaust & 2.190" Intake, for a Chevy big block 396 427 or 454 engine. I bought these awhile ago, but never used them. They come with a new unopened set of umbrella seals. The dimensions of the valves are as follows.
Intake- 2.190" head diameter, 0.371 stem diameter, total length 5.23". Exhaust- 1.82" head diameter, 0.371 stem diameter, total length 5.375".