Membrane Kits include 150 standard, 1mil PTFE membranes or 150 high-sensitivity, 0.5mil PTFE membranes, in 10 packs of 50 Membrane/KCI Kits include 30 standard or high-sensitivity membranes, 1 oz
(30mL) dropper bottle with KCI crystals for adding distilled water and a probe contour tool For use with probes 13-299-43 (Model 5739), 13-298-80 (Model 5750), 15-176-50 (Model 5718), 13-298-16 (Model 5300 Biological Oxygen Monitor), and 13-298-56, -57, or -62 (Model 55 Handheld Dissolved Oxygen Meters)