BlueLab PH Down Solutions， 1 L</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Can be used undiluted with the Bluelab pH Controller and Bluelab pH Controller Connect</li><li>They're manufactured with premium quality acid/alkali concentration</li><li>Has excellent quality</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/31gSSbbF07L.jpg' noproxy></br>