HM Digital 1000ppm TDS Calibration Solution</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>NaCl calibration solution， available in 342 ppm or 1000 ppm</li><li>Comes in lightweight HDPE plastic bottles</li><li>Sealed with a coated foam liner</li><li>Laboratory quality NIST-traceable solutions</li><li>Any brand TDS meter can be calibrated to any brand of calibration solution</li><li>Bottles have a convenient wide mouth， allowing a user to simply insert the meter into a stable bottle</li><li>Sealed with coated foam liner</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/31nnKCt73sL.jpg' noproxy></br>