I have a pair of new Eimac SK-406 chimney globes. The SK-406s are new.
Dimensions of the SK-406 chimneys 3 7/8" bottom x 5" height x 2 1/2" top.
These are used on various amps (Drake, Ameritron, Henry...)for cooling some
of the following tubes:
SK-406 EIMAC CHIMNEYs 4-250A, 4-400A, 3-400, 3-500....
Price for pair is $78 shipped/insured stateside.