Noseclip, plastic, foam-padded noseclips help increase the accuracy of spirometry results by eliminating the escape of air through the nostrils during testing
PH Buffer Capsule for calibration of pH, contains four capsules for each of the 4, 7, and 10 pH buffers, making a total of 12 capsules. The set also includes a small bottle of universal indicator with mold inhibitor, Has to be added to 100 ml of distilled water