Are you looking for PH calibration solution kit? Our products will be your . Seal packets design makes it easy to use and no need to measure, mix with water, bringing you more convenience. This is a very efficient and practical PH calibration solution kit, which will meet your needs very well. Features -Color:Assorted Color -Material:ABS -Size:7.00X6.00X0.50cm/2.75X2.36X0.20in -The package includes 6.86, 4.01 and 9.18 calibration solution powder for all pH needs. -Designed for portability, no need to measure, convenient for daily life. -Individual sized packets design make them can be tucked in drawer, bag or suitcase, lightweight and convenient. -Easy to use, open the packet and them mix the power with 250ml distilled water to star your labs. -The PH buffer powder has wide range of applications and fit for drinking water, aquarium, pool PH testing. Package list: 5 x ph4.01 buffer powders 5 x .86 buffer powders 5 x .18 buffer powders