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much appreciatedThey are just very small hex drives. I'm sure a message or call to Shearwater or DiveTronix will get you the specific size. Then just pick up 2 matching hex keys or mini hex drives from a local hardware store or Amazon.
This post suggests that it is a H1.5 ( Warning to Teric owners, check the tightness of the lug screws )
ETA. I just checked with my set. H1.5 is correct.