Proffesional Refratometer Sale

Thanks Marco - I have receive my refractometer (and the other goodies I added to the order :)

Once again outstanding service!!
 
@TheWaterboy, just wanted to check quick. Are these refractometers calibrated for salt water or a different solution? Just want to know if I should be checking out for 35ppt or 36.5ppt if they not calibrated for salt water. Thank you.
 
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