1/4" ID Peristaltic Pump Santoprene Tubing (TPE55S Back Catalog number: PC-5000-1177 Availability: In the manufacturer's stock Price on request - + Recommended MA812/2 Conductivity/TDS probe with 2meter cable(MC 310). Price on request MA923D/1 pH/ORP/Temp amplified probe MA923D/1 Price on request 1127-1L Chemsolute pH buffer with colour coding (20 °C), pH 7.00, green, 1L Price on request