Quote Originally Posted by AnnaK View Post
Does anyone know what is the difference between the two?

The R-0014 came with my test kit and is called "Residential Series". The R-0004 is in the "2000 Series". Both come in the .75 oz size.

I buy refills from Amato Ind. but they don't carry the R-0014. Are the two products interchangeable?
R-0014 is used in a 9 ml comparator, R-0004 is used in a 44 ml comparator, They are NOT interchangeable!