Quote: (Originally Posted by
Sandy)

Thanks Dave,
Are they compatible with a salt water environment? I can't recall exactly but thought I read something about moisture penetrating the outer layers or neck threads and causing corrosion on the internal flask (if it has an aluminium sphere underneath - I'm guessing here)
Cheers,
Sandy
Dunno. Dreager would say "No". They are probably fine though, designed for harsh environments, etc. I'd keep them from getting dropped and would "use 'em and see". I know that they have been used before by guys who could not source metal spheres. Might help the ass-down trim of the Mark-15 too, at the expense of needing to add more weight elsewhere to the thing.
Dave
Dave