Check the listing for details. EXTECH 6015WC Electrode,pH 0 to 14,Bulb 3YTJ4. Condition: New. Listed at 94.20 USD. Replacement Electrode, Testing Parameter pH, pH Range 0 to 14, Tip Shape Bulb, Operating Temp. Range 32 Degrees to 122 Degrees F, Body Material Polycarbonate, Diameter 12mm, Length 218 mm, Cable Length 0.99 m, Amplifier Not Applicable, Temp. Sensor 0 Degrees to 99.9 Degrees C, For Use With pH220 pH Meter, Standards CE, Shelf Life 12 mo, Junction Single, Electrolyte KCL, Recommended Use Liquids, Includes Cable (39 in), Manufacturers Warranty Length 6 mo Extech(R) Waterproof pH Electrode for Palm pH features an automatic temperature compensation via built-in pt-100-Ohm sensor. Has 4-wire waterproof connector features glass pH sensing bulb surrounded by protective teeth. Includes 39" cable. For use with Extech(R) model pH 220-C waterproof palm pH meter, sold separately.