On 9 November 2017 at 07:30, Van Horn, David < david.vanhorn@backcountryaccess.com> wrote: > > Indeed. Breaking the seal is irreversible, and if I have leaks, I > contaminate my flasks. > Like this one: https://www.ebay.com/i/332271376045?chn=3Dps&dispItem=3D1 This 'looks' to be better value. Maybe not. https://www.ebay.com/itm/Neon-Gas-Research-Grade-99-999-pure/182886625910?h= ash=3Ditem2a94e47276:g:SI8AAOSwjDZYflRQ Russell --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .