_:nddbfae658df845d891ff742a7eb3ce48xb0
<http://schema.org/description>
"With high quality 'petal'; discs that require no interpretation, definite results only, the Contour Kit has all that is needed for the accurate calculation of swimming pool water balance.\r\nNote: Contour comparator can only be used with Contour Discs"
<https://www.jplennard.com/palintest-contour-comparator-balanced-water-kit.html>