15x16x22mm plus the fittings, 6v at 1.6w (0.27a) so it could be ran easily off the BEC. Would flow 200ml/min at 2.8psi. ~$65 usd plus shipping.
I'll try to get a few for testing purposes.
Edit: it's the M200P4, but I'll probably get one of the larger series to test as well.