Hach Hardness 3 Buffer Solution for use with multiple Hach Testing Kits. Product DetailsManufacturer Part Number: 42462Manufacturer Part Number: 424-62Manufacturer: Hach CompanyUsage: For Measuring Total Hardness in WaterApplications: Water TreatmentApplications: Water Testing EDTA TitrationCanada Delivery Information Hach 42462All Canadian Provinces - No Other CountryOntario, Quebec, Nova ScotiaAlberta, British Columbia, ManitobaNew Brunswick, Prince Edward IslandNunavut, Yukon & Northwest TerritoriesSaskatchewan, Newfoundland & Labrador