Hach Hardness 1 Buffer Solution for use with multiple Hach Testing Kits. Product DetailsManufacturer Part Number: 42432Manufacturer Part Number: 424-32Manufacturer: Hach CompanyUsage: For Measuring Total Hardness in WaterApplications: Water TreatmentApplications: Water Testing EDTA TitrationCanada Delivery Information Hach 42432All Canadian Provinces - No Other CountryOntario, Quebec, Nova ScotiaAlberta, British Columbia, ManitobaNew Brunswick, Prince Edward IslandNunavut, Yukon & Northwest TerritoriesSaskatchewan, Newfoundland & Labrador