[Amps] Chimney material

[Thomas Hix]

Hi Guys;
Do any of you know what is the name of the rubber like material that a lot 
of amp builders (like Alpha) uses for their chimney material? Also would 
like to know supplier if possible.
Thanks
Tom...w4th





Tom's Tubes: Specializing in Amateur Radio Amplifier Tubes & Sockets, CT 
Brand CW Keys, & G3SEK Triode/Tetrode Boards and Kits. 
http://www.tomstubes.com

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