Red Sea reefmat 500 plumbing

[SocalReefer760]

Plan on buying reefmat 500 and was wondering if anyone knows what size this tubing is? Is it metric or standard?

 

[TX_REEF]

I believe it is metric - it's very easy to fit it to any near-sized threaded fitting, though, due to the flexibility. The reefmat also comes with adhesive for this purpose.