SEt of 2 pH Calibration Solutions (4 and 7) via MoreBeerMore Info
From the product description, check product page for current description, price and availability:
If you’re a serious homebrewer, you know the importance of proper pH during the brewing process. Use these calibration solutions to keep your pH meter reading accurately before each brew.
Includes 4oz each of 4.00 and 7.00 buffers. We package these solutions from bulk quantities to get you the best pricing. For testing, pour buffers into a small glass. You do not want to stick the probe of the pH meter into the buffer jars directly because you will eventually sacrifice the accuracy of your buffers.
Expires after 6 months if unopened. Expires after 3 months if opened.
As of this posting, MoreBeer has these for just $7.99. Shipping is free with a qualifying $59 order to many US addresses. Price, promotions and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this this post was published; however, they may differ from those you see when you visit the product page. Check the product page for current price, description and availability.