1/4" ID Peristaltic Pump Santoprene Tubing (TPE55S Back Catalog number: PC-5000-1177 Availability: In the manufacturer's stock Price on request - + Recommended MA919B/1 Glass pH electrode, refillable, BNC, 1m Price on request MA840 Polarographic DO probe with 3m cable Price on request MA841 Spare membrane for MW600 (5 pcs). Price on request