![Milwaukee Instruments pH 7 Calibration Solution, 20 ml Sachets, case of 25](http://goodgrow.com/cdn/shop/products/MI10007P_1_{width}x.jpg?v=1632660336)
This item is sachets .
Available in 220 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 220 ml leak-proof bottles and are recommended for lab application. Sachets are sealed against light and air and are ideal for on-the-spot calibration. Simply open, insert the tester or electrode into the sachet and calibrate. Sachets are sold in boxes of 25 pieces.