Thermo isolation manifold isolators. If you have a thermo modular valves (left and right sides) you can use the isolator to connect them. These will also work with several other manufacturers modular valves.... dive rite, sea elite, halcyon, etc. Service history unknown, however the appear to have been serviced and cleaned. If you'd like to have them serviced and 02 cleaned prior to shipping, I can do that for $20 per isolator. DM me.
