BlueLab PH up Solutions， 1 L<div style="text-align: left;"><strong>[Product Information]</strong><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><img src="http://ecx.images-amazon.com/images/I/31%2BtoC0rnDL.jpg" noproxy>