I have an awesome old cat that I believe came from Kiev in the mid-1990s. It has a titanium frame and four big latex bladders housed inside a coated outer shell. The valves screw in to rubber gaskets and have latex one-way valves with screw-on tops. They are not military valves and I have not been able to locate replacements so far in the US, although admittedly I have not tried very hard. I may be able to post pictures of the valves if anyone has any ideas. Thanks in advance.