This FAS/DPD Test will test Free Chlorine up to 50+ppm with an accuracy of .5ppm. (.2ppm if you really need to be precise) Additionally, it contains the R-0003 reagent so you can test for combined chloramines.
Neither the test for free chlorine or for combined chloramines is found in the cheaper kits. Your water chemistry management takes on a whole new meaning once you are able to perform these essential tests.
It does not come in its own kit box or container. It contains enough chemistry to perform around 40-70 tests....depending on your chlorine level.