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 MA991B/1 Combined glass pH electrode MA991B/1 Price on request 51343101 pH electrode InLab Expert Pro Price on request