Test Strip, Test Form Strip, Overall Length 3 in, Test Type Test Strips, Testing Parameter One Chlorine Dioxide, Overall Width 1/4 in, Parameter Measurements Included 0 to 500 ppm Chlorine Dioxide, Number of Tests 50, pH Resolution Not Applicable, Test Detects For Chlorine Dioxide, Includes Color Chart Label, Parameter Five Measurements Included Not Applicable, Parameter Four Measurements Included Not Applicable, Parameter Three Measurements Included Not Applicable