All OAKTON Conductivity/TDS calibration solutions are cross checked using different test methods, premixed, and ready to use.|OAKTON conductivity/TDS solution bottles are labeled with the name and CAS number for all ingredients to conform with “Right-to-Know” requirements, and includes an MSDS. Solutions come in one pint bottles. Dimensions: 7.75"H x 2.25" dia. Shpg wt: 1.1 lbs.|OAKTON Conductivity “Singles” pouches are convenient, air-tight pouches with high-precision calibration standards. Ideal for field use-take them to your test site for on-the-spot calibration. Pouches are labeled with equivalent values for ppm in KCl, NaCl and 442 and Conductivity values at 25°C and CAS numbers for “Right-to-Know” requirements. Each box contains twenty 20 mL pouches. Dimensions: 4.5"L x 5"W x 4.5"H (box). Shpg wt 1 lb per box.