Check the listing for details. HM Digital COM-100,PH-200, Protective Case & Solutions BEST HYDRO GROWERS KIT !!. Condition: New. Listed at 169.50 USD. HM Digital Waterproof Professional Series Meter KitThe HM-HPK-1 is the hydro growers all in one solution. This kit combines the accurate HM-COM-100 TDS (PPM)/EC/Temp meter and the reliable HM-PH-200 pH/Temp meters together into one package.It also includes a zip closure protective case and a generous amount of calibration and storage solutions. This is the best value on the market for anyone looking to test as the Pro’s do.Includes(1) HM-PH-200 Meter (HM Digital Pro Series Pen style pH/Temp meter)(1) HM-COM-100 Meter (HM Digital Pro Series Pen style TDS/EC/Temp meter)(3) HM-PH-4 Buffer Solution (20ml) (HM Digital pH 4.0 buffer solution - 20 packets of 20 ml)(3) HM-PH-7 Buffer Solution (20ml) (HM Digital pH 7.0 buffer solution - 20 packets of 20 ml)(3) HM-CP-1000 Solution (20ml) (HM Digital TDS 1000 ppm calibration solution - 20 packets of 20 ml)(3) HM-PH-STOR Solution (20ml) (HM Digital pH Electrode storage solution - 60 cc)(2) Lanyard(3) Solution Cup