RCA 6BL8 ECF80 Vacuum Tube

Got a pair of vintage RCA 6BL8 vacuum tubes here. These are the ECF80 equivalent, made in the USA. They've got that classic orange RCA labeling, though it's a bit worn on one of them. Pulled these from some old gear a while back. Great for anyone doing some radio restoration or working on vintage audio projects. Selling as-is since I don't have a tester handy right now, but they look physically solid with no cracks in the glass.