1/4" ID Peristaltic Pump Santoprene Tubing (TPE55S Back Catalog number: PC-5000-1177 Availability: In the manufacturer's stock Price on request - + Recommended MA917B/1 Comb glass pH electrode, DJ, refill, BNC, 1m Price on request SE510 Conductivity/TDS probe with 1meter cable SE510 Price on request MC730 MC730 Controller kit Price on request