1/4" ID Peristaltic Pump Santoprene Tubing (TPE55S Back Catalog number: PC-5000-1177 Availability: In the manufacturer's stock Price on request - + Recommended MI58P pH/ORP/Temp probe for pH58 Price on request MA919B/1 Glass pH electrode, refillable, BNC, 1m Price on request MA920B/1 Combined pH electrode MA920B/1 Price on request