Paul

I am finished with machining and just waiting for the Stainless clamps
from Parker...

Seals are good to 300 degrees and need to be assembled with a non
petroleum based lubricant such as silicone. These are the Viton but
there is the hollow core elastomer type that is about $3 each that I can
get on request.  I don't think sealing is any better, just easier to
assemble.....

They are ready now to order and I am asking $40 each plus shipping, less
than originally quoted.

thanks

jeff