Accutest brand nitrazine indicator paper is the economical choice among FDA-listed medical pH test products for the in-vitro determination of body-fluid pH in the 4.57.5 range Widely used in hospitals and doctors' offices to detect the presence of amniotic fluid in vaginal secretions during late-term pregnancy, a sign of premature amniotic sac rupture Packaged in a convenient, easy-to-use dispenser, complete with color chart, each roll of Accutest pH Nitrazine Indicator Paper provides approximately 100 tests Test papers give instant, easy-to-read results, with clear, bright matches at 0.5 intervals from pH 4.5 to 7.5 One roll is ¼ inch wide x 15 feet Product Specifications Quantity Per Sell: 1 Shipping Dimensions: 2.25 x 0.75 x 2 IC Shipping Weight: 0.04 LB Application: Nitrazine Indicator Paper in Dispenser Brand/Series: Accutest® Product Dimensions: 1/2 Inch X 50 Foot Roll Country of Origin: United States