Reporting question for Tube Shield - For 9-Pin, Aluminum, Extra Long

Product:
Tube Shield - For 9-Pin, Aluminum, Extra Long

Question:
Will these cover fit EL84 amp tube and do they dissipate heat any better having them covered?

Answer:
These will fit an EL84, but is not recommended because of the (lack of) heat dissipation. The shield would prevent heat dissipation, and therefore we do not advise using these with power tubes.