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:
As previously stated, we do not advise these for use with EL84s, but if your amp came with them and you want to replace them, maybe consider S-H144.