They use standard bayonet caps available in a variety of pressure ratings, superlightweight, £55 each

What volume are they?

They are 750ml

Bah. The one I want to replace is 1000ml.

This will work perfect!

OK, I'll take the one that only has the bottom input. u2u me payment details.

Regards,
Dave

Are these still available? I haven't heard from you....

Right hand tank sold

One Header tank left!